Vorlesung Grundlagen magnetischer Materialien (Magnetismus I), Basic introduction to magnetic materials (Magnetism I)

OPAL-Kurs

Olav Hellwig (E-Mail: olav.hellwig@…), Fabian Samad (E-Mail: fabian.samad@…) und Peter Heinig (E-Mail: peter.heinig@…)

Update from 4.4.2023:

Today we had only two participants in the first organizational meeting for the elective Magnetism II module (Methods and applications in modern magnetism). There were no students participating from last semester’s Magnetism I module (Basic introduction to magnetic materials), so that we decided to not proceed with the Magnetism II module (which from a pre-knowledge requirement builds upon the Magnetism I module), but instead offer the magnetism I module once more for students without any pre-knowledge in magnetism and magnetic materials. This opens up the participation in this terms module for many more students. As a consequence of the above decision the next Magnetism I lecture and further information will be provided next week on Tuesday 11.4. at 8 AM (!) in our lecture room P031 in the physics building.

If after these changes you are still interested to participate in the Magnetism I module, then please make sure that you attend this next lecture in person.

Content of the Magnetism I module (Basic introduction to magnetic materials):

The focus of this elective module is the magnetism of (ferro) magnetic materials, its origin and the phenomena resulting from it. The lectures will cover the following topics:

• introduction to and history of magnetic materials

• electro-magnetism with a focus on magneto-statics and magnetic materials

• quantum mechanical foundations of magnetic materials

• from magnetic moments in atoms and ions to the magnetism in solid state physics

• spontaneous magnetization of magnetic materials (ferromagnetism)

• mico-magnetic energies of ferromagnetic materials: demagnetization, exchange and anisotropy

• magnetic field reversal and domain formation

Organizational:

In the SS 2023 we offer the Magnetism I lecture (“Basic introduction to magnetic materials”) as well as the corresponding Magnetism I exercise class in a hybrid (in person/online mixed) format.

We will provide weekly lecture recordings, each about 90 minutes in average length. Access to these recordings will occur via our Magnetism I webpage. You should listen to the weekly lecture recordings at your own convenience until the next weekly live feedback session at our designated “Magnetism I” lecture time slot, currently scheduled for Tuesdays at 8:00 AM in room P031 (C60.031). During these in presence feedback sessions we will do a short quiz about the main topics of the previous recorded lecture and you will have the opportunity to ask questions about the lecture content. We can then go to the corresponding slides of the lecture and discuss your questions in detail and hopefully resolve any issues.

Important Notice:

Often it is not possible to avoid time slot conflicts completely for every possible timetable constellation, in particular since this class is offered to Physics, AFM and SeKo students in parallel.

For the case you are interested to attend this lecture/exercise class and obtain credit for it, but you have a conflict in your lecture schedule with the current time slot and thus are not able to attend the next session on 11.4. at 8:00 AM, then please contact me prior to the session via Email ( olav.hellwig@…) and let me know. Often it is possible to adjust the time slot of the lecture/exercise class in the first couple of lecture weeks (when we know who is interested in attending the lecture) to avoid an overlap with other lectures. So please let me know if this is the case for you and we will try to adjust the lecture/exercise class time slot correspondingly.

Lecture of 11.04.2023 (Organization+motivation, history of magnetism)

Lecture of 18.04.2023 (Magnetism in a nutshell)

Lecture of 25.04.2023 (Magnetostatics)

Lecture of 02.05.2023 (Magnetostatics with materials)

Lecture of 09.05.2023 (Elements of quantum mechanics)

Lecture of 16.05.2023 (Spin-orbit coupling, Lande factor etc)

Lecture of 23.05.2023 (Multi electron systems)

Lecture of 30.05.2023 (Localized and delocalized electrons)

Lecture of 06.06.2023 (Excursion on Orbitals, Crystal fields)

Lecture of 13.06.2023 (Remaining parts on crystal fields)

Lecture of 20.06.2023 (Band magnetism, Stoner criterion)

Lecture of 27.06.2023 (Magnetic energies)

Lecture of 04.07.2023 (Magnetic energy competition and length scales)

Lecture of 11.07.2023 (Magnetic field reversal)