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Professur Elektrochemische Sensorik und Energiespeicherung



Visiting researcher from IIT Indore, India 
Welcome to Dr. Pravarthana Dhanapal, Assistant Professor at Indian Institute of Technology (IIT) Indore, Department of Chemistry, who visits our group in the frame of the Paired Early Career Fellowship in Applied Research (PECFAR) funded by the Indo-German Science and Technology Centre.
Dr. Liza Herrera Diez visits our group 
Liza Herrera Diez from CNRS and Université Paris-Saclay, France visits our group and gives an invited talk at the GdCH Kolloquium on Oxygen-based magneto-ionics: mechanisms, recent developments and perspectives.




Group event at Augustusburg  
Our group event 2024 took place in Ausgustusburg. We had a great time together.






First ERC group workshop with Dr. Philippe Allongue 
We had an intense two-day ERC workshop "Nanoelectrochemistry meets magnetism" with talks by all group members. Thank you very much, Dr. Philippe Allongue from CNRS for attending, giving two excellent talks and intensively participating in scientific discussions.


Research visit to India 
Markus had an exciting research visit to the IIT (Indian Institute of Technology) Indore, IIT Bombay und IISc Bangalore in the frame of the Paired Early Career Fellowship in Applied Research (PECFAR) funded by the Indo-German Science and Technology Centre.

23.11. 2023

ERC Consolidator Grant ACTIONS 
Karins ERC Consolidator Grant proposal ACTIONS: Engineering Magneto-IONic Materials for Energy-Efficient Actuation and Sensing: From Interfaces to Multifunctional Voltage-Tunable Micromagnets has been favorably evaluated! We look forward to working on 3D Magneto-ionics! See press release.

30.10 - 03.11. 2023

MMM 2023 in Dallas 
We had an exciting Conference on Magnetism and Magnetic Materials in Dallas, with Karin as Co-Program Chair and leading the evening session on Magneto-ionics, and Markus giving a talk.


Publication in ACS Materials Au 
Our work on Voltage-Controlled ON–OFF-Switching of Magnetoresistance in FeOx/Fe/Au Aerogel Networks is published ACS Materials Au. Congratulation to Martin!


Welcome to Karen Kavanagh as Visiting Scholar  
We are excited to welcome Prof. Karen Kavanagh from Simon Fraser University, Burnaby/Vancouver, Canada as visiting scholar in our group for the next four months.



Top-cited perspective article on magneto-ionic materials  
Our article "Advances in magneto-ionic materials and perspectives for their application" is among the top-cited articles in APL Materials 2022. doi.org/10.1063/5.0042544



Publication in ACS Nano  

Shanshans impressive work on Hierarchically Engineered Manganite Thin Films with a Wide-Temperature-Range Colossal Magnetoresistance Response is published ACS Nano. Congratulation! doi.org/10.1021/acsnano.2c10200




Presentations at MMM 2022 
Our group presented latest results in magneto-ionics at the hybrid 67th Annual Conference on Magnetism and Magnetic Materials in Minneapolis, MN, USA. Markus gave an invited talk, Maksim and Shashank contributed with virtual talks and Karin was active as program comittee member.


Innovative teaching project funded by FCI
Our teaching project for the redesign of basic and advanced practical courses in the field of electrochemistry receives funding from the FCI (Fonds der Chemischen Industrie).


Kids´ University Lecture on Chemistry and Electricity Generation
With a show of exciting (electro)chemical experiments, Karin and Peter held a lecture for the Kids´ University at Phänomenia in Stollberg. Thanks to Jessica for the preparation of experiments!


Talks at the 23rd International Conference on Solid State Ionics in Boston, MA. 
Karin gave an invited talk on magneto-ionic control and Markus and Maksim both had contributed talks at the Iono-Electronics session at SSI-23, which was organized by Geoffrey Beach from the MIT. A great conference linking experts in electrochemistry from various backgrounds such as battery research, memristors and magneto-ionics.  


Talks at the International Fischer Symposium and the BeMAGIC/MagneEFi workshop
Martin presented a talk on self-termination of Fe films at the International Fischer Symposium, a renowned meeting on nanoscale electrochemistry at Kloster Seeon. In parallel, Maksim and Karin contributed to the Joint meeting of the BeMAGIC and MagnEFi European ITN networks at Aalto University/Helsinki, devoted to magnetoelectric materials for information technologies.


Publication in Nano Letters
Our work on size-specific magnetic configurations in electrodeposited epitaxial iron nanocuboids is published now in Nano Letters. Congratulation to Shanshan! doi.org/10.1021/acs.nanolett.2c00607


Project on magneto-ionic control of exchange bias funded by DFG
Our joint DFG project proposal was successful! Together with the Ehresmann group (Uni Kassel) we will research the role of defects in the magneto-ionic control of exchange-bias thin films.


Publication in Electrochimica Acta 
Our manuscipt on nanoscale iron films by self-terminated electrodeposition has been accepted for publication in Electrochimica Acta! Here, we investigated the fundamental processes during self-termination of nanoscale iron films by combining electrochemical quartz microbalance measurements and  model calculations based on diffusion theory. We found interesting catalytic effects related to the Fe(OH)2/Fe interface formation and enhanced stability of the self-terminated films.Congratulation to Martin!  doi.org/10.1016/j.electacta.2022.140170


Group workshop and Welcome to Dr. Piotr Graczyk
We had two intense days of talks, discussion and future planning of research and teaching activities at TUC. A walk to the castle and lunch at the Turm-Brauhaus was fun, too. We welcome Dr. Piotr Graczyk from the Adam Mickiwiecz University and the Institute of Molecular Physics, Polish Academy of Sciences, Poznan, Poland as a guest scientist in our group. In his 5 month research stay he will investigate voltage-control of magnetic films using our in situ Kerr microscope. 


Our brand new Kerr microscope arrived
Our new Kerr microscope arrived and is now installed. We are excited to start using it to characterize the magnetic microstructures of thin films and nanostructures. Especially, we will use it together with a home-built electrochemical in situ cell to investigate the impact of liquid electrolyte gating on the magnetic response, i.e. to study magneto-ionic materials for voltage control magnetism. See examples of what can be done here: DOI: doi.org/10.1002/aelm.202000406.



Invited talk on Magneto-ionics at the Joint IOP/ITN Magnefi Magnetism School

The Joint IOP/ITN Magnefi Magnetism School provided a mixture of training and topical lectures on magnetism, spintronics and electric field effects on magnetism. Prof. Karin Leistner contributed with an invited lecture on Magneto-ionics and Shashank Honnali presented a poster on Magneto-ionic effects in Nanodot arrays.




image: Mantao Huang
Publication in Nature Nanotechnology
Our work on controlling ferrimagnets by voltage has been published in Nature Nanotechnology (DOI: doi.org/10.1038/s41565-021-00940-1). In this joint work, lead by the Beach group from the Massachusetts Institute of Technology (MIT) in Cambridge (USA), we demonstrate 180° magnetization reversal purely by electric fields via magneto-ionic control of ferrimagnets. See the TUC University News) for more details.






PhD defense of Jonas Zehner
Jonas Zehner successfully finished his PhD time with the disputation of his thesis on Voltage control of uniaxial and unidirectional magnetic thin films by electrochemical reactions. Congratulation!



Editor's suggestion
Our work on Magnetoionic control of perpendicular exchange bias has been published in Physical Review Materials and has been chosen as editor's suggestion. The results were obtained in a cooperation with the Massachusetts Institute of Technology, Cambridge, USA. Congratulation to Jonas!