List of Publications
193. Influence of oxidic and metallic interfaces on the magnetic damping of Permalloy thin films
Verena Ney, Ruslan Salikhov, Kilian Lenz, Olav Hellwig, Jürgen Lindner, and Andreas Ney
Phys. Rev. Materials 7, 124403 (2023)
DOI: 10.1103/PhysRevMaterials.7.124403
192. Structural and magnetic properties of thin cobalt films with mixed hcp and fcc phases
Gauravkumar Patel, Fabian Ganss, Ruslan Salikhov, Sven Stienen, Lorenzo Fallarino, Rico Ehrler, R.A. Gallardo, Olav Hellwig, Kilian Lenz, and Jürgen Lindner
Phys. Rev. B 18, 184429 (2023)
DOI: 10.1103/PhysRevB.108.184429
191. Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion
I. Ilyakov, A. Brataas, TVAG de Oliveira, A. Ponomaryov, JC Deinert, O. Hellwig, J. Faßbender, J. Lindner, R. Salikhov, S. Kovalev
Nat. Comm. 14, 7010 (2023)
DOI: 10.1038/s41467-023-42845-8
190. Control of Four-Magnon Scattering by Pure Spin Current in a Magnonic Waveguide
T. Hache, L. Körber, T. Hula, K. Lenz, A. Kákay, O. Hellwig, J. Lindner, J. Fassbender, and H. Schultheiss
Phys. Rev. Appl. 20, 014062 (2023)
DOI: 10.1103/PhysRevApplied.20.014062
189. Coupling of terahertz light with nanometer-wavelength magnons
Ruslan Salikhov, Igor Ilyakov, Lukas Körber, Attila Kákay, Rodolfo A Gallardo, Alexey Ponomaryov, Jan-Christoph Deinert, Thales VAG de Oliveira, Kilian Lenz, Jürgen Fassbender, Stefano Bonetti, Olav Hellwig, Jürgen Lindner, Sergey Kovalev
IEEE, 2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers) , (2023)
DOI: 10.1109/INTERMAGShortPapers58606.2023.10305027
188. Determining the preferred directions of magnetisation in cubic crystals using symmetric polynomial inequalities
Fabian Samad and Olav Hellwig
Emergent Scientist 7, (2023)
187. Spin-wave nonreciprocity at the spin-flop transition region in synthetic antiferromagnets
O. Gladii, R. Salikhov, O. Hellwig, H. Schultheiss, J. Lindner, and R. A. Gallardo
Phys. Rev. B 107, (2023)
DOI: 10.1103/PhysRevB.107.104419
186. Coupling of terahertz light with nanometre-wavelength magnon modes via spin–orbit torque
Ruslan Salikhov, Igor Ilyakov, Lukas Körber, Attila Kákay, Rodolfo A. Gallardo, Alexey Ponomaryov, Jan-Christoph Deinert, Thales 09:22 11.12.2023V. A. G. de Oliveira, Kilian Lenz, Jürgen Fassbender, Stefano Bonetti, Olav Hellwig, Jürgen Lindner and Sergey Kovalev
Nat. Phys. 19, 529-535 (2023)
DOI: 10.1038/s41567-022-01908-1
185. Electrical detection of non-linear magnetic vortex dynamics
Lakshmi Ramasubramanian, Vadym Iurchuk, Attila Kakay, Olav Hellwig and Alina Deac
Phys. Rev B 106, (2022)
DOI: 10.1103/PhysRevB.106.214413
184. Magneto-structural phase transition in Fe60V40 alloy thin films
S. Anwar, H. Cansever, B. Boehm, R.A. Gallardo, R. Heubner, S. Zhou , U. Kentsch, B. Eggert, H. Wende, K. Potzger, J. Fassbender, K. Lenz, J. Lindner, O. Hellwig, R. Bali
ACS Appl. Electron. Mater. 4, 3860–3869 (2022)
183. Dynamic behavior of a two-dimensional ferromagnet: proximity effect of a paramagnetic surrounding
Hamza Cansever, Md. Shadab Anwar, Sven Stienen, Kilian Lenz, Ryszard Narkowicz, Gregor Hlawacek, Kay Potzger, Olav Hellwig, Jürgen Fassbender, Jürgen Lindner, Rantej Bali
Sci Rep 12, 14809 (2022)
DOI: 10.1038/s41598-022-15959-0
182. Control and tunability of magnetic bubble states in multilayers with strong perpendicular magnetic anisotropy at ambient conditions
R. Salikhov, F. Samad, S.S.P.K. Arekapudi, J. Lindner, N. Kiselev and O. Hellwig
Phys. Rev. B 106, (2022)
DOI: 10.1103/PhysRevB.106.054404
181. Spin polarization of electrons through α-helix-polyalanine molecules studied with spin-unpolarized scanning tunneling microscopy
Nguyen T. N. Ha, L. Rasabathina, O. Hellwig, A. Sharma, G. Salvan, L. T. Baczewski, S. Yochelis, Y. Paltiel, C. Tegenkamp
ACS Appl. Mater. Interfaces 14, 38013–38020 (2022)
180. Application of micro-fabricated microwave resonator in CoPd based magnetic hydrogen gas sensor
Thomas A. Schefer, Ryszard Narkovic, Kilian Lenz, Fabian Ganss, Olav Hellwig, Malcolm P. Robers, Mariusz Martyniuk, Jürgen Lindner and Mikhail Kostylev
Phys. Rev. 18, (2022)
DOI: 10.1103/PhysRevApplied.18.024015
179. Role of vibrational properties and electron-phonon coupling on thermal transport across metal-dielectric interfaces with ultrathin metallic interlayers
Shany Mary Oommen, Lorenzo Fallarino, Jakob Heinze, Olav Hellwig, Simone Pisana
Journal of Physics: Condensed Matter 34, 46 (2022)
178. Tailoring exchange-dominated synthetic layered antiferromagnets: From collective reversal to exchange bias
Benny Böhm, Olav Hellwig
Small 18, 2204804 (2022)
177. Collaborative Filler Network for Enhancing the Performance of BaTiO3/PDMS Flexible Piezoelectric Polymer Composite Nanogenerators
Ayda Bouhamed, Nathanael Jöhrmann, Slim Naifar, Benny Böhm, Olav Hellwig, Bernhard Wunderle and Olfa Kanoun
Sensors 22, 4181 (2022)
DOI: 10.3390/s22114181
176. Stimulated Resonant Inelastic X-Ray Scattering in a Solid
Daniel J. Higley, Zhao Chen, Martin Beye, Markus Hantschmann, Alex H. Reid, Virat Mehta, Olav Hellwig, Georgi L. Dakovski, Ankush Mitra, Robin Y. Engel, Tim Maxwell, Yuantao Ding, Stefano Bonetti, Maximilian Bucher, Sebastian Carron, Tyler Chase, Emmanuelle Jal, Roopali Kukreja, Tianmin Liu, Alexander Föhlisch, Hermann A. Dürr, William F. Schlotter, and Joachim Stöhr
Communications Physics 5, 83 (2022)
DOI: 10.1038/s42005-022-00857-8
175. Mechanism of femtosecond laser induced ultrafast demagnetization in ultrathin film magnetic multilayers
Santanu Pan, Fabian Ganss, Suryanarayan Panda, Gabriel Sellge, Chandrima Banerjee, Jaivardhan Sinha, Olav Hellwig and Anjan Barman
Journal of Materials Science 57, 6212–6222 (2022)
DOI: 10.1007/s10853-022-07016-y
174. Magnetic Configuration Driven Femtosecond Spin Dynamics in Synthetic Antiferromagnets
Anulekha De, Sri Sai Phani Kanth Arekapudi, Leopold Koch, Fabian Samad, Surya Narayan Panda, Benny Böhm, Olav Hellwig, and Anjan Barman
ACS Appl. Mater. Interfaces 14, 13970–13979 (2022)
173. Terahertz charge and spin transport in metallic ferromagnets: The role of crystalline and magnetic order
Kumar Neeraj, Apoorva Sharma, Maria A. Hoffmann, Patrick Matthes, Georgeta Salvan, Olav Hellwig, and Stefano Bonetti
Appl. Phys. Lett. 120, 102406 (2022)
DOI: 10.1063/5.0067443
172. Magnetic separation of rare-earth ions: property database and Kelvin force distribution
Zhe Lei, Barbara Fritzsche, Ruslan Salikhov, K. Schwarzenberger, Olav Hellwig, and Kerstin Eckert
J. Phys. Chem. C 126, 2226 (2022)
171. State-resolved ultrafast charge and spin dynamics in [Co/Pd] multilayers
Loic Le Guyader, Daniel J. Higley, Matteo Pancaldi,5 Tianmin Liu, Zhao Chen, Tyler Chase, Patrick W. Granitzka, Giacomo Coslovich, Alberto A. Lutman, Georgi L. Dakovski, William F. Schlotter, Padraic Shafer, Elke Arenholz, Olav Hellwig, Mark L. M. Lalieu, Bert Koopmans, Alexander H. Reid, Stefano Bonetti, Joachim Stöhr, and Hermann A. Dürr
Appl. Phys. Lett. 120, 032401 (2022)
DOI: 10.1063/5.0076953
170. Highly Tunable Magnetic and Magnetotransport Properties of Exchange Coupled Ferromagnet/Antiferromagnet-Based Heterostructures
Sri Sai Phani Kanth Arekapudi, Daniel Bülz, Fabian Ganss, Fabian Samad, Chen Luo, Dietrich R. T. Zahn, Kilian Lenz, Georgeta Salvan, Manfred Albrecht, and Olav Hellwig
ACS Applied Materials & Interfaces 13, 59497-59510 (2021)
169. Agility of Spin Hall Nano-Oscillators
F. J. T. Gonçalves, T. Hache, M. Bejarano, T. Hula, O. Hellwig, J. Fassbender, and H. Schultheiss
Phys. Rev. Applied 16, 054050 (2021)
DOI: 10.1103/PhysRevApplied.16.054050
168. B20–MnSi films grown on Si(100) substrates with magnetic skyrmion signature
Zichao Li, Ye Yuan, René Hübner, Viktor Begeza, Thomas Naumann, Lars Rebohle, Olav Hellwig, Manfred Helm, Kornelius Nielsch, Slawomir Prucnal, and Shengqiang Zhou
Materials Today Physics 21, 100541 (2021)
DOI: 10.1016/j.mtphys.2021.100541
167. Control of Stripe-Domain-Wall Magnetization in Multilayers Featuring Perpendicular Magnetic Anisotropy
Ruslan Salikhov, Fabian Samad, Benny Böhm, Sebastian Schneider, Darius Pohl, Bernd Rellinghaus, Aladin Ullrich, Manfred Albrecht, Jürgen Lindner, Nikolai S. Kiselev, and Olav Hellwig
Phys. Rev. Applied 16, 034016 (2021)
DOI: 10.1103/PhysRevApplied.16.034016
166. Laser induced crystallization of Co–Fe–B films
Maria Almeida, Apoorva Sharma, Patrick Matthes, Nicole Köhler, Sandra Busse, Matthias Müller, Olav Hellwig, Alexander Horn, Dietrich R. T. Zahn, Georgeta Salvan and Stefan E. Schulz
Scientific Reports 11, 14104 (2021)
DOI: 10.1038/s41598-021-93009-x
165. Controlled and deterministic creation of synthetic antiferromagnetic domains by focused ion beam irradiation
Fabian Samad, Gregor Hlawacek, Sri Sai Phani Kanth Arekapudi, Xiaomo Xu, Leopold Koch, Miriam Lenz and Olav Hellwig
Appl. Phys. Lett. 119, 022409 (2021)
DOI: 10.1063/5.0049926
164. Noncollinear Remanent Textures Induced by Surface Spin Flop in Synthetic Antiferromagnets with Perpendicular Anisotropy
Benny Böhm, Lorenzo Fallarino, Darius Pohl, Bernd Rellinghaus and Olav Hellwig
Phys. Rev. Applied 16, 014028 (2021)
DOI: 10.1103/PhysRevApplied.16.014028
163. CoCrFeNi High-Entropy Alloy Thin Films Synthesised by Magnetron Sputter Deposition from Spark Plasma Sintered Targets
Holger Schwarz, Thomas Uhlig, Niels Rösch, Thomas Lindner, Fabian Ganss, Olav Hellwig, Thomas Lampke, Guntram Wagner and Thomas Seyller
Coatings 11, 468 (2021)
162. A hybrid piezoelectric composite flexible film based on PVDF-HFP for boosting power generation
Ayda Bouhamed, Qin Binyu, Benny Böhm, Nathanael Jöhrmann, Bernhard Wunderle, Olav Hellwig and Olfa Kanoun
Composites Science and Technology 208, 108769 (2021)
DOI: 10.1016/j.compscitech.2021.108769
161. Nondiffusive Transport and Anisotropic Thermal Conductivity in High-Density Pt/Co Superlattices
Mohammadreza Shahzadeh, Olga Andriyevska, Ruslan Salikhov, Lorenzo Fallarino, Olav Hellwig, and Simone Pisana
ACS Appl. Electron. Mater. 3, 1931–1936 (2021)
160. Robustness of the remanent magnetic domain pattern formation and associated stripe-bubble transitions in Co/Pt multilayers against field sequencing
Aaron Gentillon, Carson Richards, Luis A. Ortiz-Flores, Jeremy Metzner, David Montealegre, Matthew Healey, Kelsey Cardon, Andrew Westover, Olav Hellwig and Karine Chesnel
AIP Advances 11, 015339 (2021)
DOI: 10.1063/9.0000214
159. Direct imaging of distorted vortex structures and magnetic vortex annihilation processes in ferromagnetic/antiferromagnetic disk structures
Sri Sai Phani Kanth Arekapudi, Benny Böhm, Lakshmi Ramasubramanian, Fabian Ganss, Peter Heinig, Sven Stienen, Ciarán Fowley, Kilian Lenz, Alina M. Deac, Manfred Albrecht, and Olav Hellwig
Phys. Rev. B 103, 014405 (Editors' Suggestion) (2021)
DOI: 10.1103/PhysRevB.103.014405
158. Inertial spin dynamics in ferromagnets
Kumar Neeraj, Nilesh Awari, Sergey Kovalev, Debanjan Polley, Nanna Zhou Hagström, Sri Sai Phani Kanth Arekapudi, Anna Semisalova, Kilian Lenz, Bertram Green, Jan-Christoph Deinert, Igor Ilyakov, Min Chen, Mohammed Bawatna, Valentino Scalera, Massimiliano d’Aquino, Claudio Serpico, Olav Hellwig, Jean-Eric Wegrowe, Michael Gensch, Stefano Bonetti
Nat. Phys. 17, 245-250 (2021)
DOI: 10.1038/s41567-020-01040-y
157. Higher-order ferromagnetic resonances in out-of-plane saturated Co/Au magnetic multilayers
L. Fallarino, S. Stienen, R. A. Gallardo, J. A. Arregi, V. Uhlíř, K. Lenz, R. Hübner, A. Oelschlägel, O. Hellwig, and J. Lindner
Phys. Rev. B 102, 094434 (2020)
DOI: 10.1103/PhysRevB.102.094434
156. Coupling of Lamb Waves and Spin Waves in Multiferroic Heterostructures
Sidhant Tiwari, Joseph D. Schneider, Sebastian Wintz, S. S. P. K. Arekapudi, Killian Lenz, Andres Chavez, Jürgen Lindner, Olav Hellwig, Gregory P. Carman, Robert N. Candler
IEEE/ASME Journal of Microelectromechanical Systems 29, 1121-1123 (2020)
DOI: 10.1109/JMEMS.2020.3017138
155. Control of magneto-optical properties of cobalt-layers by adsorption of α-helical polyalanine self-assembled monolayers
Apoorva Sharma, Patrick Matthes, Ivan Soldatov, Sri Sai Phani Kanth Arekapudi, Benny Böhm, Marina Lindner, Oleksandr Selyshchev, Nguyen Thi Ngoc Ha, Michael Mehring, Christoph Tegenkamp, Stefan E Schulz, Dietrich R. T. Zahn, Yossi Paltiel, Olav Hellwig, Georgeta Salvan
J. Mater. Chem. C 8, 11822-11829 (2020)
DOI: 10.1039/D0TC02734K
154. Spin stress contribution to the lattice dynamics of FePt
Alexander von Reppert, Lisa Willig, Jan-Etienne Pudell, Steffen Zeuschner, Gabriel Sellge, Fabian Ganss, Olav Hellwig, Jon Ander Arregi, Vojtěch Uhlíř, Aurélien Crut, Matias Bargheer
Sci. Adv. 6, eaba1142 (2020)
153. Bipolar spin Hall nano-oscillators
T. Hache, Y. Li, T. Weinhold, B. Scheumann, F. J. T. Goncalves, O. Hellwig, J. Fassbender, and H. Schultheiss
Appl. Phys. Lett. 116, 192405 (2020)
DOI: 10.1063/5.0008988
152. Freestanding Positionable Microwave-Antenna Device for Magneto-Optical Spectroscopy Experiments
T. Hache, M. Vaňatka, L. Flajšman, T. Weinhold, T. Hula, O. Ciubotariu, M. Albrecht, B. Arkook, I. Barsukov, L. Fallarino, O. Hellwig, J. Fassbender, M. Urbánek, and H. Schultheiss
Phys. Rev. Applied 13, 054009 (2020)
DOI: 10.1103/PhysRevApplied.13.054009
151. Topological Hall Effect in Single Thick SrRuO3 Layers Induced by Defect Engineering
Changan Wang, Ching-Hao Chang, Andreas Herklotz, Chao Chen, Fabian Ganss, Ulrich Kentsch, Deyang Chen, Xingsen Gao, Yu-Jia Zeng, Olav Hellwig, Manfred Helm, Sibylle Gemming, Ying-Hao Chu, and Shengqiang Zhou
Adv. Electron. Mater. 6, 2000184 (2020)
150. Crystallization of optically thick films of CoxFe80−xB20: Evolution of optical, magneto-optical, and structural properties
Apoorva Sharma, Maria A. Hoffmann, Patrick Matthes, Olav Hellwig, Cornelia Kowol, Stefan E. Schulz, Dietrich R. T. Zahn, and Georgeta Salvan
Phys. Rev. B 101, 054438 (2020)
DOI: 10.1103/PhysRevB.101.054438
149. Manipulating the Energy Balance of Perpendicular-Anisotropy Synthetic Antiferromagnets by He+-Ion Irradiation
Leopold Koch, Fabian Samad, Miriam Lenz, and Olav Hellwig
Phys. Rev. Appl. 13, 024029 (2020)
DOI: 10.1103/PhysRevApplied.13.024029
148. Ion-Irradiation-Induced Cobalt/Cobalt Oxide Heterostructures: Printing 3D Interfaces
Oğuz Yıldırım, Donovan Hilliard, Sri Sai Phani Kanth Arekapudi, Ciarán Fowley, Hamza Cansever, Leopold Koch, Lakshmi Ramasubramanian, Shengqiang Zhou, Roman Böttger, Jürgen Lindner, Jürgen Faßbender, Olav Hellwig, and Alina M. Deac
ACS Appl. Mater. Interfaces 12, 9858 (2020)
147. Edge localization of spin waves in antidot multilayers with perpendicular magnetic anisotropy
S. Pan, S. Mondal, M. Zelent, R. Szwierz, S. Pal, O. Hellwig, M. Krawczyk, and A. Barman
Phys. Rev. B 101, 014403 (2020)
DOI: 10.1103/PhysRevB.101.014403
146. Finite-size effects in ultrafast remagnetization dynamics of FePt
Lisa Willig, Alexander von Reppert, Marwan Deb, Fabian Ganss, Olav Hellwig, and Matias Bargheer
Phys. Rev. B 100, 224408 (2019)
DOI: 10.1103/PhysRevB.100.224408
145. Femtosecond X-ray induced changes of the electronic and magnetic response of solids from electron redistribution
Daniel J. Higley, Alex H. Reid, Zhao Chen, Loic Le Guyader, Olav Hellwig, Alberto A. Lutman, Tianmin Liu, Padraic Shafer, Tyler Chase, Georgi L. Dakovski, Ankush Mitra, Edwin Yuan, Justine Schlappa, Hermann A. Dürr, William F. Schlotter, Joachim Stöhr
Nat. Commun. 10, 5289 (2019)
DOI: 10.1038/s41467-019-13272-5
144. Spectroscopic ellipsometry and magneto-optical Kerr effect spectroscopy study of thermally treated Co60Fe20B20 thin films
Maria A. Hoffmann, Apoorva Sharma, Patrick Matthes, Shun Okano, Olav Hellwig, Ramona Ecke, Dietrich R. T. Zahn, Georgeta Salvan, Stefan E. Schulz
J. Phys.: Condens. Matter 32, 055702 (2019)
143. Antiferromagnetic domain wall control via surface spin flop in fully tunable synthetic antiferromagnets with perpendicular magnetic anisotropy
Benny Böhm, Lorenzo Fallarino, Darius Pohl, Bernd Rellinghaus, Kornelius Nielsch, Nikolai S. Kiselev, and Olav Hellwig
Phys. Rev. B 100, 140411(R) (2019)
DOI: 10.1103/PhysRevB.100.140411
142. Reconfigurable Spin-Wave Nonreciprocity Induced by Dipolar Interaction in a Coupled Ferromagnetic Bilayer
R. A. Gallardo, T. Schneider, A. K. Chaurasiya, S. S. P. K. Arekapudi, A. Roldan-Molina, R. Hübner, K. Lenz, A. Barman, J. Fassbender, J. Lindner, O. Hellwig, and P. Landeros
Phys. Rev. Appl. 12, 034012 (2019)
DOI: 10.1103/PhysRevApplied.12.034012
141. Domain Wall Based Spin-Hall Nano-Oscillators
N. Sato, K. Schultheiss, L. Körber, N. Puwenberg, T. Mühl, A.A. Awad, S.S.P.K. Arekapudi, O. Hellwig, J. Fassbender, and H. Schultheiss
Phys. Rev. Lett. 123, 057204 (2019)
DOI: 10.1103/PhysRevLett.123.057204
140. Synthesis of Mg and Zn Diolates and their Use in Metal Oxide Deposition
Peter Frenzel, Andrea Preuß, Jörn Bankwitz, Colin Georgi, Fabian Ganss, Lutz Mertens, Stefan E. Schulz, Olav Hellwig, Michael Mehring, and Heinrich Lang
RSC Adv. 9, 10657 (2019)
DOI: 10.1039/C9RA00585D
139. Combined frequency and time domain measurements on injection-locked, constriction-based spin-Hall nano-oscillators
T. Hache, T. Weinhold, K. Schultheiss, J. Stigloher, F. Vilsmeier, C. Back, S.S.P.K. Arekapudi, O. Hellwig, J. Fassbender, and H. Schultheiss
Appl. Phys. Lett. 114, 102403 (2019)
DOI: 10.1063/1.5082692
138. All-Optical Multipulse Pump-Probe Method for Selective Control of Magnetization Precessions in Magnetic Multilayers
Cassidy Berk, Fabian Ganss, Mike Jaris, Manfred Albrecht, and Holger Schmidt
IEEE J. Sel. Top. Quantum Electron. 25, 8800205 (2019)
DOI: 10.1109/JSTQE.2019.2899779
137. Control of domain structure and magnetization reversal in thick Co/Pt multilayers
L. Fallarino, A. Oelschlägel, J. A. Arregi, A. Bashkatov, F. Samad, B. Böhm, K. Chesnel, and O. Hellwig
Phys. Rev. B 99, 024431 (2019)
DOI: 10.1103/PhysRevB.99.024431
136. The influence of the internal domain wall structure on spin wave band structure in periodic magnetic stripe domain patterns
Pawel Gruszecki, Chandrima Banerjee, Michal Mruczkiewicz, Olav Hellwig, Anjan Barman, and Maciej Krawczyk
Solid State Physics 70, Chapter Two, 79-132 (2019)
DOI: 10.1016/bs.ssp.2019.09.003
135. Morphological stripe-bubble transition in remanent magnetic domain patterns of Co/Pt multilayer films and its dependence on Co thickness
Karine Chesnel, Andrew S. Westover, Carson Richards, Brittni Newbold, Matthew Healey, Lauren Hindman, Berg Dodson, Kelsey Cardon, David Montealegre, Jeremy Metzner, Tobias Schneider, Benny Böhm, Fabian Samad, Lorenzo Fallarino and Olav Hellwig
Phys. Rev. B 98, 224404 (2018)
DOI: 10.1103/PhysRevB.98.224404
134. Ultrafast Self-Induced X-Ray Transparency and Loss of Magnetic Diffraction
Z. Chen, D. J. Higley, M. Beye, M. Hantschmann, V. Mehta, O. Hellwig, A. Mitra, S. Bonetti, M. Bucher, S. Carron, T. Chase, E. Jal, R. Kukreja, T. Liu, A. H. Reid, G. L. Dakovski, A. Föhlisch, W. F. Schlotter, H. A. Dürr, and J. Stöhr
Phys. Rev. Lett. 121, 137403 (2018)
DOI: 10.1103/PhysRevLett.121.137403
133. Ultrafast laser generated strain in granular and continuous FePt thin films
A. von Reppert, L. Willig, J.-E. Pudell, M. Rössle, W. Leitenberger, M. Herzog, F. Ganss, O. Hellwig, and M. Bargheer
Appl. Phys. Lett. 113, 123101 (2018)
DOI: 10.1063/1.5050234
132. High-frequency measurements of thermophysical properties of thin films using a modified broad-band frequency domain thermoreflectance approach
Mohammadreza Shahzadeh, Mizanur Rahman, Olav Hellwig, and Simone Pisana
Review of Scientific Instruments 89, 084905 (2018)
DOI: 10.1063/1.5037117
131. Measuring the thermal properties of anisotropic materials using beam-offset frequency domain thermoreflectance
Mizanur Rahman, Mohammadreza Shahzadeh, Philipp Braeuninger-Weimer, Stephan Hofmann, Olav Hellwig, and Simone Pisana
Journal of Applied Physics 123, 245110 (2018)
DOI: 10.1063/1.5033966
130. Beyond a phenomenological description of magnetostriction
A. H. Reid, X. Shen, P. Maldonado, T. Chase, E. Jal, P. Granitzka1, K. Carva, R. K. Li, J. Li, L. Wu, T. Vecchione, T. Liu, Z. Chen, D.J. Higley, N. Hartmann, R. Coffee, J. Wu, G.L. Dakowski, W. Schlotter, H. Ohldag, Y.K. Takahashi, V. Mehta, O. Hellwig, A. Fry, Y. Zhu, J. Cao1, E.E. Fullerton1, J. Stöhr, P. M. Oppeneer, X.J. Wang, H.A. Dürr
Nature Communications 9, Article number: 388 (2018)
DOI: 10.1038/s41467-017-02730-7
129. All-optical measurement of interlayer exchange coupling in Fe/Pt/FePt thin films
C. Berk, F. Ganss, M. Jaris, M. Albrecht, and H. Schmidt
Appl. Phys. Lett. 112, 052401 (2018)
DOI: 10.1063/1.5004686
128. Thermally induced magnetic switching in bit-patterned media
B. Pfau, C. M. Günther, T. Hauet, S. Eisebitt, and O. Hellwig
J. Appl. Phys. 122, 043907 (2017)
DOI: 10.1063/1.4992808
127. Magnetic Switching in Granular FePt Layers Promoted by Near-Field Laser Enhancement
P. W. Granitzka, E. Jal, L. Le Guyader, M. Savoini, D. J. Higley, T. Liu, Z. Chen, T. Chase, H. Ohldag, G. L. Dakovski, W. F. Schlotter, S. Carron, M. C. Hoffman, A. X. Gray, P. Shafer, E. Arenholz, O. Hellwig, V. Mehta, Y. K. Takahashi, J. Wang, E. E. Fullerton, J. Stöhr, A. H. Reid, and H. A. Dürr
Nano Lett. 17, 2426 (2017)
DOI: 10.1021/acs.nanolett.7b00052
126. Magnonic band structure in a Co/Pd stripe domain system investigated by Brillouin light scattering and micromagnetic simulations
C. Banerjee, P. Gruszecki, J. W. Klos, O. Hellwig, M. Krawczyk, and A. Barman
Phys. Rev. B 96, 024421 (2017)
DOI: 10.1103/PhysRevB.96.024421
125. Double exchange bias in ferrimagnetic heterostructures
B. Hebler, P. Reinhardt, G. L. Katona, O. Hellwig, and M. Albrecht
Phys. Rev. B 95, 104410 (2017)
DOI: 10.1103/PhysRevB.95.104410
124. Model-based magnetization retrieval from holographic phase images
Falk Röder, Karin Vogel, Daniel Wolf, Olav Hellwig, Sung Hun Wee, Sebastian Wicht, and Bernd Rellinghaus
Ultramicroscopy 176, 177 (2017)
123. Accumulative magnetic switching of ultra-high-density recording media by circularly polarized light
Y.K. Takahashi, R. Medapalli, S. Kasai, J. Wang, K. Ishioka, S.H. Wee, O. Hellwig, K. Hono, and E.E. Fullerton
Physical Review Applied 6, 054004 (2016)
DOI: 10.1103/PhysRevApplied.6.054004
122. Influence of crystallographic structure on the thermal conductivity of FePt thin films
Ashutosh Giri, Sung Hun Wee, Olav Hellwig, and Patrick E. Hopkins
Scientific Reports 6 (2016) 32077,
DOI: 10.1038/srep32077
121. Helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt
multilayers
Yu. Tsema, G. Kichin, O. Hellwig, V. Metha, A. V. Kimel, A. Kirilyuk, and Th. Rasing
Appl. Phys. Lett. 109 (2016) 072405.
DOI: 10.1063/1.4961246
120. Elimination of X-Ray Diffraction through Stimulated X-Ray Transmission
B. Wu, T. Wang, C. E. Graves, D. Zhu, W. F. Schlotter, J. J. Turner, O. Hellwig, Z. Chen,
H. A. Dürr, A. Scherz, and J. Stöhr
Phys. Rev. Lett. 117 (2016) 027401.
DOI: 10.1103/PhysRevLett.117.027401
119. Atomic resolution strain analysis in highly textured FePt thin films
S. Wicht, S. H. Wee, O. Hellwig, V. Mehta, S. Jain, D. Weller, and B. Rellinghaus
J. Appl. Phys. 119 (2016) 115301.
DOI: 10.1063/1.4943936
118. Enhancement of magnetic domain topologies in Co/Pt thin films by fine tuning the magnetic field path through out the hysteresis loop
Andrew S.Westover, Karine Chesnel, Kelsey Hatch, Philip Salter, Olav Hellwig
J. Magn. Magn. Mater. 399 (2016) 164.
117. Bit Patterned Magnetic Recording: Theory, Media Fabrication, and Recording Performance
Thomas R. ALBRECHT, Hitesh ARORA, Vipin AYANOOR-VITIKKATE, Jean-Marc BEAUJOUR, Daniel BEDAU, David BERMAN, Alexei L. BOGDANOV, Yves-Andre CHAPUIS, Julia CUSHEN, Elizabeth E. DOBISZ, Gregory DOERK, He GAO, Michael GROBIS, Bruce GURNEY, Fellow, IEEE, Weldon HANSON, Olav HELLWIG, Toshiki HIRANO, Jeffrey LILLE, Pierre-Olivier JUBERT, Dan KERCHER, Zuwei LIU, C. Mathew MATE, Iouri OBOUKHOV, Kanaiyalal C. PATEL, Kurt RUBIN, Ricardo RUIZ, Manfred SCHABES, Lei WAN, Dieter WELLER, Tsai-Wei WU, and En YANG
IEEE Trans. Magn. 51 (2015) 0800342.
DOI: 10.1109/TMAG.2015.2397880
116. Extracting magnetic cluster size and its distributions in advanced perpendicular recording media with shrinking grain size using small angle x-ray scattering
Virat Mehta, Tianhan Wang, Yoshihiro Ikeda, Ken Takano, Bruce D. Terris, Benny Wu, Catherine Graves, Michael Shu, Andreas Scherz, Jo Stöhr and Olav Hellwig
Appl. Phys. Lett. 106 , (2015) 202403.
DOI: 10.1063/1.4921403
115. Curie temperature distribution in FePt granular media
Simone Pisana, Shikha Jain, James W. Reiner, Oleksandr Mosendz, Gregory J. Parker, Matteo Staffaroni, Olav Hellwig, and Barry C. Stipe
IEEE Trans. Magn. 51 (2015) 3200205 (TMRC proceeding).
DOI: 10.1063/1.4873543
114. Modification of the structural and magnetic properties of granular FePt films by seed layer conditioning
S. Wicht, V. Neu, L. Schultz, V. Mehta, S. Jain, J. Reiner, O. Mosendz, O. Hellwig, D. Weller, and B. Rellinghaus
J. Appl. Phys. 117 (2015) 013907.
DOI: 10.1063/1.4905422
113. Optically Induced Spin Wave Dynamics in [Co/Pd]8 Antidot Lattices with Perpendicular Magnetic Anisotropy
S. Pal, J. W. Klos, K. Das, O. Hellwig, P. Gruszecki, M. Krawczyk, and A. Barman
Appl. Phys. Lett. 105 (2014) 162408.
DOI: 10.1063/1.4898774
112. Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates
B. Pfau, C. M. Günther, E. Guehrs, T. Hauet, T. Hennen, S. Eisebitt, and O. Hellwig
Appl. Phys. Lett. 105 (2014) 132407.
DOI: 10.1063/1.4896982
111. Bit Patterned Media Optimization at 1 Tdot/in2 by Post-Annealing
Olav Hellwig, Ernesto E. Mariners, Dan Kescher, Tyler Hennen, Andrew McCallum, Elizabeth Dobisz, Tsai-Wei Wu, Jeff Lille, Toshiki Hirano, Ricardo Ruiz, Michael K. Grobis, Dieter Weller and Thomas R. Albrecht
J. Appl. Phys. 116 (2014) 123913.
DOI: 10.1063/1.4896667
110. Measurement of the Curie temperature Distribution in FePt granular magnetic media
S. Pisana, S. Jain, J. W. Reiner, G. J. Parker, C. C. Poon, O. Hellwig, and B. C. Stipe
Appl. Phys. Lett. 104 (2014) 162407.
DOI: 10.1063/1.4873543
109. Influence of magnetic domain size on dipolar interactions and hysteresis field asymmetry in layered high/low coercivity perpendicular anisotropy systems
Thomas Hauet and Olav Hellwig
J. Appl. Phys. 115 (2014) 123911.
DOI: 10.1063/1.4870136
108. Effect of the Spin-Twist Structure on the Spin-Wave Dynamics of the Fe55Pt45/Ni80Fe20 Exchange Coupled Bilayers with varying Ni80Fe20 thicknesses
Semanti Pal, Saswati Barman, Olav Hellwig, Anjan Barman
J. Appl. Phys. 115 (2014) 17D105.
DOI: 10.1063/1.4855015
107. Magnetic design evolution in perpendicular magnetic recording media as revealed by resonant small angle x-ray scattering
Tianhan Wang, Virat Mehta, Yoshihiro Ikeda, Hoa Do, Kentaro Takano, Sylvia Florez, Bruce D. Terris, Benny Wu, Catherine Graves, Michael Shu, Ramon Rick, Andreas Scherz, Joachim Stohr, and Olav Hellwig
Appl. Phys. Lett. 103 (2013) 112403.
DOI: 10.1063/1.4820921
106. Influence of structural disorder on magnetic domain formation in perpendicular anisotropy thin films
M. S. Pierce, J. E. Davies, J. J. Turner, K. Chesnel, E. E. Fullerton, J. Nam, R. Hailstone, S. D. Kevan, J. B. Kortright, Kai Liu, L. B. Sorensen, B. R. York, and O. Hellwig
Phys. Rev. B 87 (2013) 184428.
DOI: 10.1103/PhysRevB.87.184428
105. Stoner enhanced paramagnetic influence on superconductivity in a superconductor/metallic heterostructure
S. J. Ray, S.J. Lister, S.L. Lee, O. Hellwig, J. Stahn
Physica C 487 (2013) 67.
DOI: 10.1016/j.physc.2013.01.019
104. Bit Patterned Media at 1 Tdot/in2 and Beyond
Thomas R. Albrecht, Daniel Bedau, Elizabeth Dobisz, He Gao, Michael Grobis, Olav Hellwig, Dan Kercher, Jeffrey Lille, Ernesto Marinero, Kanaiyalal Patel, Ricardo Ruiz, Manfred E. Schabes, Lei Wan, Dieter Weller, and Tsai-Wei Wu
IEEE Trans. Magn. 49 (2013) 773 (TMRC 2012 proceeding)
103. Diamondoid coating enables disruptive approach for chemical and magnetic imaging with 10 nm spatial resolution
Hitoshi Ishiwata, Yves Acremann, Andreas Scholl, Eli Rotenberg, Olav Hellwig, Elizabeth Dobisz, Andrew Doran, Boryslav A. Tkachenko, Andrey A. Fokin, Peter R. Schreiner, Jeremy E.P. Dahl, Robert M. K. Carlson, Nick Melosh, Zhi-Xun. Shen and Hendrik Ohldag
Appl. Phys. Lett. 101 (2012) 163101.
DOI: 10.1063/1.4756893
102. Fabrication of 1 Teradot/in2 CoCrPt bit patterned media and recording performance with a conventional read/write head
Elizabeth A. Dobisz, Dan Kercher, Michael Grobis, Olav Hellwig, Ernesto E. Marinero, Dieter Weller, and Thomas R. Albrecht
Journal of Vacuum Science Technology B (30)6.
DOI: 10.1116/1.4757955
101. Rapid preparation of electron beam induced deposition Co MFM tips with 10 nm spatial resolution
L. Belova, O. Hellwig, E. Dobisz, E. D. Dahlberg
Review of Scientific Instruments 83 (2012) 093711.
DOI: 10.1063/1.4752225
100. Modifications of magnetic anisotropy and magnetization reversal in [Co0.4nm/Pd0.7nm]50 multilayers induced by 10 keV-He ion bombardment
Arno Ehresmann, Olav Hellwig, Oliver Buhl, Nicolas David Müglich, Tanja Weis, and Dieter Engel,
J. Appl. Phys. 112 (2012) 063901.
DOI: 10.1063/1.4752274
99. Prevention of dewetting during annealing of FePt films for bit patterned media applications
A. T. McCallum, J. Lille, D. Weller and O. Hellwig
Appl. Phys. Lett. 101 (2012) 092402.
DOI: 10.1063/1.4748162
98. Femtosecond Single-shot Imaging of Nanoscale Ferromagnetic Order in Co/Pd Multilayers Using Resonant X-Ray Holography
Tianhan Wang, Diling Zhu, Benny Wu, Catherine Graves, Stefan Schaffert, Torbjoern Rander, Leonard Mueller, Boris Vodungbo, Cedric Baumier, David P. Bernstein, Bjoern Braeuer, Vincent Cros, Sanne De Jong, Renauld Delaunay, Andreas Fognini, Roopali Kukreja, Sooheyong Lee, Victor-Lopez-Flores, Jyoti Mohanty, Bastian Pfau, Horia Popescu, Maurizio Sacchi, Anna B. Sardinha, Marc Messerschmidt, Joshua J. Turner, William F. Schlotter, Olav Hellwig, Yves Acremann, Christian Gutt, Jean Yves Bigot, Hermann Duerr, Christine Boeglin, Joachim Stoehr, Eric Beaurepaire, Stefan Eisebitt, Gerhard Gruebel, Jan Luening, Joachim Stohr and Andreas Scherz
Phys. Rev. Lett. 108 (2012) 267403.
DOI: 10.1103/PhysRevLett.108.267403
97. Time-resolved measurement of spin-wave spectra in CoO capped [Co(t)/Pt(7Å)]n-1 Co(t) multilayer systems
S. Pal, B. Rana, S. Saha, R. Mandal, O. Hellwig, J. Romero-Vivas, S. Mamica, J. W. Klos, M. Mruczkiewicz, M. L. Sokolovskyy, M. Krawczyk, and A. Barman
J. Appl. Phys. 111 (2012) 07C507.
DOI: 10.1063/1.3672857
96. Generation and Control of Ultrashort-Wavelength 2D Surface Acoustic Waves at nanoscale interfaces
Qing Li, Kathleen Hoogeboom-Pot, Damiano Nardi, Margaret M. Murnane, Henry C. Kapteyn, Mark E. Siemens, Erik H. Anderson, Olav Hellwig, Elizabeth Dobisz and Bruce Gurney, Ronggui Yang and Keith A. Nelson
Phys. Rev. B 85, (2012) 195431.
95. L10 FePtCu bit patterned media
C. Brombacher, M. Grobis, J. Lee, J. Fidler, T. Eriksson, T. Werner, O. Hellwig, and M. Albrecht,
Nanotechnology 23 (2011) 025301.
DOI: 10.1088/0957-4484/23/2/025301
94. Observation of Laser Induced Magnetization Dynamics in Co/Pd Multilayers with Coherent X-ray Scattering
B. Wu, D. Zhu, Y. Acremann, T.A. Miller, A.M. Lindenberg, O. Hellwig, J. Stohr, and A. Scherz,
Appl. Phys. Lett. 99 (2011) 252505.
DOI: 10.1063/1.3670305
93. Impact of Out-of-Plane Translational Order in Block Copolymer Lithography
Joan K. Bosworth, Olav Hellwig, Elizabeth Dobisz, Ricardo Ruiz
Macromolecules, 44 (23), (2011) 9196.
DOI: 10.1021/ma201967a
92. Quantitative Magnetic Force Microscopy study of the diameter evolution of bubble domains in a (Co/Pd)80 multilayer
Silvia Vock, Zolt´an Sasv´ariy, Cristina Bran, Fabian Rhein, Ulrike Wolff, Nikolai Kiselev, Alexei Bogdanov, Ludwig Schultz, Olav Hellwig, and Volker Neu
IEEE Transactions on Magnetics, Vol. 47, No. 10, (2011) 2352.
DOI: 10.1109/TMAG.2011.2155630
91. Magnetic ground and remanent states of synthetic metamagnets with perpendicular anisotropy
N. S. Kiselev, U. K. Roeßler, A. N. Bogdanov and O. Hellwig
J. Phys.: Conf. Ser. 303 (2011) 012051.
DOI: 10.1088/1742-6596/303/1/012051
90. Origin of magnetic switching field distribution in bit patterned media based on pre-patterned substrates
B. Pfau, C. M. Günther, E. Guehrs, T. Hauet, E. Dobisz, D. Kercher, H. Yang, L. Vinh, X. Xu, D. Yaney, R. L. Rick, S. Eisebitt, and O. Hellwig,
Appl. Phys. Lett. 99 (2011) 062502.
DOI: 10.1063/1.3623488
89. Tuning the magnetic properties of Co nanoparticles by Pt capping
A. Ebbing, O. Hellwig, L. Agudo, G. Eggeler, and O. Petracic,
Phys. Rev. B 84 (2011) 012405.
DOI: 10.1103/PhysRevB.84.012405
88. L10 FePt Based Exchange Coupled Composite Bit Patterned Films
A. T. McCallum, P. Krone, F. Springer, C. Brombacher, M. Albrecht, E. Dobisz, M. Grobis, D. Weller and O. Hellwig,
Appl. Phys. Lett. 98 (2011) 242503.
DOI: 10.1063/1.3599573
87. Recording Study on Percolated Perpendicular Media
Michael Grobis, Carsten Schulze, Marco Faustini, David Grosso, Olav Hellwig, Denys Makarov, and Manfred Albrecht
Appl. Phys. Lett. 98 (2011) 192504.
DOI: 10.1063/1.3587635
86. Influence of ion irradiation on switching field and switching field distribution in arrays of Co/Pd-based bit pattern media
T. Hauet, O. Hellwig, S.-H. Park, C. Beigné, B. D. Terris, and D. Ravelosona
Appl. Phys. Lett. 98 (2011) 172506.
DOI: 10.1063/1.3581896
85. Ferrimagnetic stripe domain formation in antiferromagnetically-coupled Co/Pt-Co/Ni-Co/Pt multilayers studied via soft x-ray techniques
O. Hellwig, C. M. Günther, F. Radu, A. Menzel, W. F. Schlotter, J. Lüning and S. Eisebitt
Appl. Phys. Lett. 98 (2011) 172503.
DOI: 10.1063/1.3583454
84. Probing the time-dependent switching probability of individual patterned magnetic islands
F. Springer, O. Hellwig, E. Dobisz, M. Albrecht, and M. Grobis
J. Appl. Phys. 109 (2011) 07B905.
DOI: 10.1063/1.3540574
83. Anisotropy Measurements of FePt Thin Films
H. J. Richter, O. Hellwig, S. Florez, C. Brombacher, and M. Albrecht
J. Appl. Phys. 109 (2011) 07B713.
DOI: 10.1063/1.3536459
82. Tunable magnonic frequency and damping in [Co/Pd]8 multilayers with variable Co layer thickness
S. Pal, B. Rana, O. Hellwig, T. Thomson, and A. Barman
Appl. Phys. Lett. 98 (2011) 082501.
DOI: 10.1063/1.3559222
81. Thickness dependent magnetization dynamics of perpendicular anisotropy Co/Pd multilayer films
Z. Liu, R. Brandt, O. Hellwig, S. Florez, T. Thomson, B. Terris, and H. Schmidt
J. Magn. Magn. Mater. 323 (2011) 1623.
DOI: 10.1016/j.jmmm.2011.01.025
80. High-Density Bit Patterned Media: Magnetic Design and Recording Performance
Michael Grobis, Olav Hellwig, Thomas Hauet, Elizabeth Dobisz, and Thomas R. Albrecht
IEEE Transactions on Magnetics, Vol. 47, No. 1, (2011) 6.
79. Exchange Bias and Domain Evolution at 10 nm Scales
I. Schmid, M.A. Marioni, P. Kappenberger, S. Romer, M. Parlinska, and H.J. Hug, O. Hellwig, M.J.Carey, and E.E. Fullerton,
Phys. Rev. Lett. 105 (2010) 197201.
DOI: 10.1103/PhysRevLett.105.197201
78. Intrinsic defects in perpendicularly magnetized multilayer thin films and nanostructures
Justin M. Shaw, Miles Olsen, June Lau, Michael L. Schneider, T.J. Silva, Olav Hellwig, Elizabeth Dobisz and Bruce D. Terris
Phys. Rev. B. 82 (2010) 144437.
DOI: 10.1103/PhysRevB.82.144437
77. Cumulative Minor Loop Growth in Co/Pt- and Co/Pd-Multilayers
A. Berger, S. Mangin, O. Hellwig, E. E. Fullerton
Phys. Rev. B 82 (2010) 104423.
DOI: 10.1103/PhysRevB.82.104423
76. Magnetic imaging at linearly polarized x-ray sources
B. Pfau, C. M. Günther, R. Könnecke, E. Gührs, O. Hellwig, W. F. Schlotter, and S. Eisebitt
Optics Express, Vol. 18, Issue 13, (2010) 13608.
DOI: 10.1364/OE.18.013608
75. Magnetic recording at 1.5 Pb/m2 using an integrated plasmonic antenna
B. C. Stipe, T. Strand, C. Poon, H. Balamane, T. Boone, J. Katine, J-L Li, V. Rawat, H. Nemoto, A. Hirotsune, O. Hellwig, R. Ruiz, E. Dobisz, N. Robertson, T. Albrecht, and B. D. Terris
Nature Photonics 4, (2010) 484 - 488.
74. Microscopic Reversal Behavior of Magnetically Capped Nanospheres
C.M. Günther, O. Hellwig, A. Menzel, B. Pfau, F. Radu, D. Makarov, M. Albrecht, W.F.
Schlotter, R. Ramon, J. Lüning, and S. Eisebitt, Phys. Rev. B. 81 (2010) 064411.
DOI: 10.1103/PhysRevB.81.064411
73. Effect of Magnetic Coupling on the Magnetization Reversal in Arrays of Magnetic Nanocaps
T.C. Ulbrich, C. Bran, D. Makarov, O. Hellwig, J.D. Risner-Jamtgaard, D. Yaney, H. Rohrmann, V. Neu, and M. Albrecht
Phys. Rev B. 81, (2010) 054421.
DOI: 10.1103/PhysRevB.81.054421
72. Influence of growth morphology on the Néel temperature of CrRu thin films and heterostructures
A. R. E. Prinsloo, H. A. Derrett, O. Hellwig, E. E. Fullerton, H. L. Alberts and N. van den Berg
J. Magn. Magn. Mater. 322 (2010) 1126.
DOI: 10.1016/j.jmmm.2009.07.063
71. Topological defect in antiferromagnetically coupled multilayers with perpendicular anisotropy
N. S. Kiselev, U. K. Roessler, A. N. Bogdanov and O. Hellwig,
Appl. Phys. Lett. 93, 162502 (2008)
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70. Bit patterned media based on e-beam directed assembly with narrow magnetic switching field distribution
O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz
Appl. Phys. Lett., 96 (2010) 052511.
DOI: 10.1063/1.3293301
69. Metamagnetic domains in antiferromagnetically coupled multilayers with perpendicular anisotropy
N. S. Kiselev, C. Bran, U. Wolff, L. Schultz, A. N. Bogdanov, O. Hellwig, V. Neu, and U. K. Roessler
Phys. Rev. B. 81 (2010) 054409.
DOI: 10.1103/PhysRevB.81.054409
68. Measurements of the write error rate in bit patterned magnetic recording at 100-300 Gb/in2
M. Grobis, E. Dobisz, O. Hellwig, M. Schabes, T. Hauet, G. Zeltzer, and T. Albrecht,
Appl. Phys. Lett. 96 (2010) 052509.
DOI: 10.1063/1.3304166
67. Role of reversal incoherency in reducing switching field and switching field distribution of exchange coupled composite bit patterned media
T. Hauet, E. Dobisz, S. Florez, J. Park, B. Lengsfield, B.D. Terris and O. Hellwig
Appl. Phys. Lett. 95 (2009) 262504.
DOI: 10.1063/1.3276911
66. Coercivity Tuning in Co/Pd Multilayer Based Bit Patterned Media
O. Hellwig, T. Hauet, T. Thomson, E. Dobisz, J. D. Risner-Jamtgaard, D. Yaney, B. D. Terris and E. E. Fullerton
Appl. Phys. Lett. 95 (2009) 232505.
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65. Revealing the reversible rotation of magnetization in Exchange-Coupled Composite media switching
T. Hauet, S. Florez, D. Margulies, Y. Ikeda, B. Lengsfield, N. Supper, K. Takano, O. Hellwig, and B.D. Terris,
Appl. Phys. Lett. 95 (2009) 222507.
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64. Suppression of the perpendicular anisotropy at the CoO Néel temperature in exchange-biased CoO/[Co/Pt] multilayers
E. Shipton, K. Chan, T. Hauet, O.Hellwig and E. E. Fullerton
Appl. Phys. Lett. 95 (2009) 132509.
DOI: 10.1063/1.3240402
63. Frustration driven stripe domain formation in Co/Pt multilayer films
J. E. Davies, O. Hellwig, E. E. Fullerton, M. Winklhofer, A. D. Shull and K. Liu,
Appl. Phys. Lett. 95 (2009) 022505.
DOI: 10.1063/1.3179553
62. Resonant magnetic scattering with soft x-ray pulses from a free electron laser operating at 1.59 nm
C. Gutt, L.-M. Stadler, S. Streit-Nierobisch, A. Mancuso, A. Schropp, J. Gulden, B. Reime, J. Feldhaus, E. Weckert, I. Vartaniants, B. Pfau, C.M. Günther, R. Könnecke, S. Eisebitt, O. Hellwig, F. Staier, A. Rosenhahn, D. Stickler, H. Stillrich, R. Frömter, H.P. Oepen, M. Martins, T. Nisius, T. Wilhein, A. Brenger, B. Faatz, N. Guerassimova, K. Honkavaara, R. Treusch, E. Saldin, S. Schreiber, E.A. Schneidmiller, M.V. Yurkov, and G. Grübel,
Phys. Rev. B 79 (2009) 212406.
DOI: 10.1103/PhysRevB.79.212406
61. Evolution of stripe and bubble domains in antiferromagnetically coupled [Co/Pt]/Ru multilayers
Cristina Bran, Anna B. Butenko, Nikolai S. Kislev, Ulrike Wolff, Ludwig Schultz, Olav Hellwig, Ulrich K. Roessler, Alexei N. Bogdanov, and Volker Neu
Phys. Rev. B 79 (2009) 024430.
60. Suppression of Magnetic Trench Material in Bit Patterned Media Fabricated by Blanket Deposition onto Pre-patterned Substrates
O. Hellwig, A. Moser, E. Dobisz, Z. Bandic, H. Yang, D. S. Kercher, J. D. Risner-Jamtgaard, D. Yaney and E. E. Fullerton
Appl. Phys. Lett. 93 (2008) 192501.
DOI: 10.1063/1.3013857
59. Evidence for a dynamic phase transition in [Co/Pt]3 magnetic multilayers
D. T. Robb, X. H. Xu, O. Hellwig, A. Berger, M. A. Novotny, P. A. Rikvold
Phys. Rev. B 78, 134422 (2008).
DOI: 10.1103/PhysRevB.78.134422
58. Topological defects in antiferromagnetically coupled multilayers with perpendicular anisotropy
N. S. Kiselev U. K. Roessler, A. N. Bogdanov, and O. Hellwig
Appl. Phys. Lett. 93 (2008) 162502.
DOI: 10.1063/1.2993328
57. Magnetic coupling in Gd/Ni bilayers
A. Barth, F. Treubel, M. Marszalek, W. Evenson, O. Hellwig, C. Borschel, M. Albrecht, G. Schatz,
J. Phys.: Condensed Matter 20 (2008) 395232.
DOI: 10.1088/0953-8984/20/39/395232
56. Step-like versus Continuous Domain Propagation in Co/Pd-Multilayer Films
C. M. Günther, F. Radu, A. Menzel, S. Eisebitt, W. F. Schlotter, J. Lüning, J. Stöhr, and O. Hellwig
Appl. Phys. Lett. 93, 072505 (2008).
DOI: 10.1063/1.2968305
55. Reversal mechanisms in perpendicularly magnetized nanostructures
Justin M. Shaw, Stephen E. Russek, Thomas Thomson, Michael J. Donahue, Bruce D. Terris, Olav Hellwig, Elizabeth Dobisz and Michael L. Schneider
Phys. Rev. B 78, 024414 (2008).
DOI: 10.1103/PhysRevB.78.024414
54. Field driven ferromagnetic phase evolution originating from the domain boundaries in antiferromagnetically coupled perpendicular anisotropy films
T. Hauet, C. Günther, O. Hovorka, A. Berger, M.-Y. Im, P. Fischer, T. Eimueller and O. Hellwig,
Appl. Phys. Lett. 93, 042505 (2008).
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53. Engineering a magnetic system with antiferromagnetic-to-ferromagnetic phase transition based on Co/Pd multilayers
Jan-Ulrich Thiele, Thomas Hauet and Olav Hellwig,
Appl. Phys. Lett. 92 (2008) 242502.
DOI: 10.1063/1.2946654
52. Direct observation of field and temperature induced domain replication in dipolar coupled perpendicular anisotropy films
T. Hauet, C. Günther, B. Pfau, M. Schabes, S. Eisebitt, P. Fischer, R.L. Rick and O. Hellwig,
Phys. Rev. B 77 (2008) 184421.
DOI: 10.1103/PhysRevB.77.184421
51. Oxidation of epitaxial Y(0001) films via evolution of laterally heterogeneous oxidation channels along defect lines
M. Ay, O. Hellwig, H.W. Becker, B. Hjörvarsson and H. Zabel,
Applied Surface Science 254 (2008) 3184.
DOI: 10.1016/j.apsusc.2007.10.093
50. Temperature Dependent Magnetization Reversal of Perpendicular AF-coupled (Co/Pt)/Ru Multilayers
J. E. Davies, O. Hellwig, E. E. Fullerton, and K. Liu,
Phys. Rev. B 77 (2008) 014421.
DOI: 10.1103/PhysRevB.77.014421
49. The Role of Uncompensated Spins in Exchange Biasing
I. Schmid, P. Kappenberger, O. Hellwig, M. J. Carey, E. E. Fullerton and H. J. Hug,
Europhysics Letters, 81 (2008) 17001.
48. Phase Imaging of Magnetic Nanostructures with Soft X-ray Spectro-Holography
A. Scherz, W. F. Schlotter, K. Chen, R. Rick, J. Stoehr, J. Luening, S. Eisebitt, Ch. Guenther, F. Radu, W. Eberhardt, O. Hellwig, and I. McNulty,
Phys. Rev. B 76 (2007) 214410.
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47. Extended Field of View Soft X-ray Fourier Transform Holography: Towards Imaging Ultrafast Evolution in a Single Shot
W. F. Schlotter, J. Lüning, R. Rick, K. Chen, A. Scherz, S. Eisebitt, Ch. Günther, W. Eberhardt, O. Hellwig and J. Stöhr,
Optics Letters 32 (2007) 3110.
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46. Off-track margin in bit patterned media
A. Moser, O. Hellwig, D. Kercher, and E. Dobisz,
Appl. Phys. Lett. 91 (2007) 162502.
DOI: 10.1063/1.2799174
45. Magnetic multilayers on nanospheres: Scaling of perpendicular exchange bias
L. Guhr, O. Hellwig, Ch. Brombacher and M. Albrecht,
Phys. Rev. B 76 (2007) 064434.
DOI: 10.1103/PhysRevB.76.064434
44. Domain structure and magnetization reversal of antiferromagnetically coupled perpendicular anisotropy films
O. Hellwig, A. Berger, J. B. Kortright and E. E. Fullerton
J. Magn. Magn. Mater. 319 (2007) 13.
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43. Investigation of Magnetization Reversal in Exchange Biased Nanocap Arrays
I. L. Guhr, S. van Dijken, G. Malinowski, P. Fischer, F. Springer, O. Hellwig and M. Albrecht
J. Phys. D: Appl. Phys. 40 (2007) 3005.
DOI: 10.1088/0022-3727/40/10/S02
42. Separating dipolar broadening from the intrinsic SFD in patterned media
O. Hellwig, A. Berger, T. Thomson, E. Dobisz , H. Yang, Z. Bandic, D. Kercher and E. E. Fullerton,
Appl. Phys. Lett. 90 (2007) 162516.
DOI: 10.1063/1.2730744
41. Magnetic phase separation in artificial A-type antiferromagnetic films
O. Hellwig, A. Berger and E. E. Fullerton,
Phys. Rev. B 75 (2007) 134416.
DOI: 10.1103/PhysRevB.75.134416
40. Disorder-Induced Magnetic Memory: Experiments and Theory
M. S. Pierce, C. R. Buechler, L. B. Sorensen, S. D. Kevan, E. A. Jagla, J. M. Deutsch, T. Mai, O. Narayan, J. E. Davies, K. Liu, G. T. Zimanyi, H. G. Katzgraber, O. Hellwig and E. E. Fullerton, P. Fischer and J. B. Kortright,
Phys. Rev. B 75 (2007) 144406.
DOI: 10.1103/PhysRevB.75.144406
39. Ultrafast magnetization dynamics in high perpendicular anisotropy [Co/Pt]n multilayers
A. Barman, S. Wang, O. Hellwig, A. Berger, E. E. Fullerton, H. Schmidt,
J. Appl. Phys. 101 (2007) 09D102.
DOI: 10.1063/1.2709502
38. Multiple Reference Fourier Transform Holography with Soft X-rays
W. F. Schlotter, R. Rick, K. Chen, A. Scherz, J. Stöhr, J. Lüning, S. Eisebitt, Ch. Günther, W. Eberhardt, O. Hellwig, and I. McNulty
Appl. Phys. Lett. 89 (2006) 163112.
DOI: 10.1063/1.2364259
37. Magnetic Imaging with Soft X-Ray Spectro-Holography
O. Hellwig, S. Eisebitt, W. Eberhardt, J. Lüning, W. F. Schlotter and J. Stöhr
J. Appl. Phys. 99 (2006) 08H307.
DOI: 10.1063/1.2165925
36. History Induced Critical Behavior in Disordered Systems
J. H. Carpenter, K. A. Dahme, A. C. Mills, M. B. Weissman, A. Berger and O. Hellwig
Phys. Rev. B 72 (2005) 052410.
DOI: 10.1103/PhysRevB.72.052410
35. Different Reversal Types in Exchange Spring Magnet Systems: Fe/SmCo versus FeNi/FePt
J. E. Davies, O. Hellwig, E. E. Fullerton, J. S. Jiang, S. D. Bader, G. T. Zimanyi and K. Liu
Appl. Phys. Lett. 80 (2005) 1234.
DOI: 10.1063/1.1954898
34. Magnetic dot arrays with multiple storage layers
M. Albrecht, G. Hu, A. Moser, O. Hellwig and B. D. Terris
J. Appl. Phys. 97 (2005) 103910.
DOI: 10.1063/1.1904705
33. Magnetic Reversal and Domain Structure in Perpendicular AF-Coupled Films
O. Hellwig, A. Berger and E. E. Fullerton
J. Magn. Magn. Mater. 290-291 (2005) 1.
DOI: 10.1016/j.jmmm.2004.11.151
32. Interparticle Magnetic Correlations in Dense Co Nanoparticle Assemblies
J. B. Kortright, O. Hellwig, S. Sun and E. E. Fullerton
Phys. Rev. B 71 (2005) 012402.
DOI: 10.1103/PhysRevB.71.012402
31. Disorder-Induced Microscopic Magnetic Memory
M. S. Pierce, C. R. Buechler, L. B. Sorensen, J. J. Turner, S. D. Kevan, E. A. Jagla, J. M. Deutsch, T. Mai, K. Liu, J. Hunter Dunn, K. M. Chesnel, J. B. Kortright, O. Hellwig and E. E. Fullerton,
Phys. Rev. Lett. 94 (2005) 017202.
30. Magnetization Reversal of Co/Pt Multilayers: Linking Macroscopic and Microscopic Level
J. E. Davies, O. Hellwig, E. E. Fullerton, G. Denbeaux, J. B. Kortright and K. Liu
Phys. Rev. B 70 (2004) 224434.
DOI: 10.1103/PhysRevB.70.224434
29. Lensless Imaging of Magnetic Nanostructures by X-ray Spectro-Holography
S. Eisebitt, J. Lüning, W. F. Schlotter, M. Lörgen, O. Hellwig, W. Eberhardt and J. Stöhr
Nature, 432 (2004) 885.
DOI: 10.1038/nature03139
28. Si-Doping of Co/Pd Multilayers for Improved Signal-to-Noise in Perpendicular Magnetic Recording Media
X. Qi, B. Stadler, R. Victora, J. Judy, O. Hellwig, and N. Supper
IEEE Transactions on Magnetics, 40 (2004) 2476.
27. Direct Imaging and Determination of the Uncompensated Spin Density in Exchange-Biased (Co/Pt)CoO Multilayers
P. Kappenberger, S. Martin, Y. Pellmont, H. J. Hug, J. B. Kortright, O. Hellwig and E. E. Fullerton
Phys. Rev. Lett. 91 (2003) 267202.
DOI: 10.1103/PhysRevLett.91.267202
26. Domain Walls in Antiferromagnetically Coupled Multilayer Films
O. Hellwig, A. Berger and E. E. Fullerton
Phys. Rev. Lett. 91 (2003) 197203.
DOI: 10.1103/PhysRevLett.91.197203
25. Polarization Effects in Coherent Scattering from Magnetic Specimen: Implications for X-ray Holography, Lensless Imaging, and Correlation Spectroscopy
S. Eisebitt, M. Lörgen, W. Eberhardt, J. Lüning, J. Stöhr, C. T. Rettner, O. Hellwig, E. E. Fullerton, and G. Denbeaux
Phys. Rev. B 68 (2003) 104419.
DOI: 10.1103/PhysRevB.68.104419
24. Magnetic X-ray Studies of Stripe Domains in Perpendicular Multilayers
O. Hellwig, G. Denbeau, J. B. Kortright and E. E. Fullerton
Physica B: Condensed Matter 336 (2003) 136.
DOI: 10.1016/S0921-4526(03)00282-5
23. Oxygen Ordering in Nb(110) Films
O. Hellwig and H. Zabel
Physica B: Condensed Matter 336 (2003) 90.
DOI: 10.1016/S0921-4526(03)00274-6
22. Soft X-ray Magnetic Scattering as a Probe of Recording Media
E. E. Fullerton , O. Hellwig, K. Takano and J. B. Kortright
NIM B 200 (2003) 202.
DOI: 10.1016/S0168-583X(02)01720-2
21. Magnetism in Heterogeneous Thin Film Systems: Resonant X-Ray Scattering Studies
J. B. Kortright, J. S. Jiang, S. D. Bader, O. Hellwig, D. T. Margulies, and E. E. Fullerton
NIM B 199, 301 (2003).
DOI: 10.1016/S0168-583X(02)01590-2
20. Tuning the Reversal of Antiferromagnetically Coupled Perpendicularly Magnetized Thin Films
O. Hellwig, T. L. Kirk, J. B. Kortright, A. Berger, and E. E. Fullerton
Nature Materials 2 (2003) 112.
DOI: 10.1038/nmat806
19. Quasielastic X-ray Speckle Metrology of Microscopic Magnetic Memory
M. Pierce, R. G. Moore, L. Sorensen, S. D. Kevan, J. B. Kortright, O. Hellwig and E. E. Fullerton
Phys. Rev. Lett. 90 (2003) 175502.
18. Soft X-ray Characterization of Perpendicular Recording Media
E. E. Fullerton, O. Hellwig, Y. Ikeda, B. Lengsfield, K. Takano and J. B. Kortright
IEEE Trans. Mag. 38 (2002) 1693.
DOI: 10.1109/TMAG.2002.1017758
17. Coercivity Mechanisms in Positive Exchange Biased Co/Pt Multilayers
T. L. Kirk, O. Hellwig, and E. E. Fullerton
Phys. Rev. B 65 (2002) 224426.
DOI: 10.1103/PhysRevB.65.224426
16. Resolving Magnetic and Chemical Correlations in CoPtCr Films using Soft X-ray Scattering
J. B. Kortright, O. Hellwig, D. T. Margulies, and E. E. Fullerton
JMMM 240 (2002) 325.
DOI: 10.1016/S0304-8853(01)00787-9
15. Magnetic Reversal of Perpendicularly Biased Co/Pt Multilayers
O. Hellwig, S. Maat, J. B. Kortright, and E. E. Fullerton
Phys. Rev. B 65 (2002) 144418.
DOI: 10.1103/PhysRevB.65.144418
14. Role of B on Grain Sizes and Magnetic Correlation Length in Recording Media as Determined by Soft X-ray Scattering
O. Hellwig, J.B. Kortright, D.T. Margulies, B. Lengsfield, and E. E. Fullerton
Appl. Phys. Lett. 80 (2002) 1234.
DOI: 10.1063/1.1448665
13. Pinpointing Chiral Structures with front / back Polarized Neutron Reflectometry
K. V. O’Donovan, J. A. Borchers, C. F. Majkrzak, O. Hellwig and E. E. Fullerton
Phys. Rev. Lett. 88 (2002) 067201.
DOI: 10.1103/PhysRevLett.88.067201
12. Extracting Buried Twists with Polarized Neutron Reflectometry
K. V. O’Donovan, J. A. Borchers, C. F. Majkrzak, O. Hellwig, and E. E. Fullerton
Applied Physics A 74 (2002) 1544.
11. Ordered Oxygen Phases in Epitaxial Nb(110) Layers
O. Hellwig, H. W. Becker, H. Zabel
Phys. Rev. B 64 (2001) 233404.
DOI: 10.1103/PhysRevB.64.233404
10. Magnetic Patterning of Chemically-Ordered CrPt3 Films
O. Hellwig, D. Weller, A. J. Kellock, J. E. E. Baglin and E. E. Fullerton
Appl. Phys. Lett. 79, 8 (2001) 1151.
DOI: 10.1063/1.1394722
9. Antiferromagnetic Structure of FePt3 Films Studied by Neutron Scattering
S. Maat, O. Hellwig, G. Zeltzer, and E. E. Fullerton
Phys. Rev. B 63 (2001) 134426.
8. In-situ X-ray Studies of Oxide Formation on Epitaxial Metal Films
H. Zabel, A. Stierle, O. Hellwig, and T. Koll,
In “Exploration of Subsurface Phenomena by Particle Scattering”, ed. N.Q. Lam, C. A. Melendres, S. K. Sinha, International Advanced Studies Press, (2000).
7. Oxidation of Epitaxial Nb(110) Films on a-plane Sapphire Substrates: An X-ray Study
O. Hellwig, G. Song, H. W. Becker, A. Birkner und H. Zabel
Material Science and Engineering Technology 31, (2000) 856.
DOI: 10.1002/1521-4052(200009)31:9<856::AID-MAWE856>3.0.CO;2-P
6. The Switching Behavior of Fe55Pt45/ Ni80Fe20 Exchange-Spring Magnets Studied by Resonant Soft X-ray Magneto-Optical Kerr Effect
O. Hellwig, J. B. Kortright, K. Takano, E. E. Fullerton
Phys. Rev. B 62 (2000) 11694.
DOI: 10.1103/PhysRevB.62.11694
5. Oxidation of Nb(110) Thin Films on Sapphire Substrates
O. Hellwig, H. Zabel
Physica B: Condensed Matter 283 (2000) 228.
4. Temperature and Thickness Dependent Epitaxial Relationship of Pd(111) on Cr(110)
O. Hellwig, K. Theis-Bröhl , G. Wilhelmi, H. Zabel,
Thin Solid Films 318 (1998) 201.
DOI: 10.1016/S0040-6090(97)01165-6
3. Growth of FCC(111) on BCC(110): Influence of Growth and Annealing Temperature on Epitaxy and Surface Morphology for Pd on Cr
O. Hellwig, K. Theis-Bröhl , G. Wilhelmi, H. Zabel,
Surface Science 410 (1998) 362.
DOI: 10.1016/S0039-6028(98)00390-2
2. Growth of FCC(111) on BCC(110): New Type of Epitaxial Transition Observed for Pd on Cr
O. Hellwig, K. Theis-Bröhl, G. Wilhelmi, A. Stierle, H. Zabel,
Surface Science 398 (1998) 379.
1. Temperature and Thickness Dependent Nishiyama-Wassermann / Kurdjumov-Sachs Epitaxial Relationship of Pd on Cr
O. Hellwig, K. Theis-Bröhl, G. Wilhelmi, A. Stierle, H. Zabel
Proceedings book „ECASIA 97“, TC 07, (1997) John Wiley & Sons, Ltd., (1997), 943.
