Dr. rer. nat. Mathias Weiler
Courses and Dates
|Title and Module Assignment|
|Magnetism Assigned to modules:|
Tue, 14:00–15:30, WMI 143
|Spin Currents and Skyrmionics Assigned to modules:|
Assisstants: Althammer, M.Geprägs, S.Opel, M.Weiler, M.
Thu, 14:00–15:30, WMI 143
|Topical Issues in Magneto- and Spin Electronics Assigned to modules:|
Assisstants: Althammer, M.Geprägs, S.Weiler, M.
Wed, 11:30–13:00, WSI S101
|Exercise to Magnetism Assigned to modules:|
|UE||1||Weiler, M.||dates in groups|
Offered Bachelor’s or Master’s Theses Topics
- Magnetization dynamics in chiral magnets
Chiral magnetic materials show exotic magnetic properties such as a skyrmion lattice phase and have strong application potential for future spintronic devices. For these applications, a detailed understanding of the magnetization dynamics in these materials is required. At WMI, we routinely use broadband magnetic resonance spectroscopy to study magnetization dynamics as a function of magnetic field, temperature and frequency in a wide range of different materials. Now, magnetization dynamics in thin film and bulk chiral magnets shall be explored, with a focus on novel resonance phenomena.
We are looking for a highly motivated and talented master student who is interested in joining our magnetization dynamics project. During your thesis, you will use state-of-the-art microwave equipment such as vector network analyzers as well as magnet cryostats and will work on the forefront of a rapidly developing scientific field.
- suitable as
- Master’s Thesis Condensed Matter Physics
- Master’s Thesis Applied and Engineering Physics
- Supervisor: Rudolf Gross
- Magnonen und Schalten von Spins in CuMnAs
Spin-based devices are considered very promising for fast and low-energy logics. This is especially true for antiferromagnets (AFM) which combine fast spin dynamics and resilience to external perturbation. The speed corresponds to the high energy of magnetic excitations (magnons), and the robustness to the vanishing net magnetization of an AFM. Recently the switching of magnetic states by external currents and the related changes in the transport properties were demonstrated for the AFM CuMnAs [Wadley et al., Science 351, 587 (2016)], making the compound a promising candidate for spintronic memory devices. On a more fundamental level, however, the spin dynamics in CuMnAs have not been studied so far. Inelastic light (Raman) scattering provides access to the dynamics of magnets [Devereaux and Hackl, Rev. Mod. Phys. 79, 175 (2007)] and one may obtain direct information on the relevant energies and spin dispersion.
It is planned to study CuMnAs in an applied magnetic field using Raman spectroscopy. The work includes an introduction to the physics of magnetism, spintronics, to spectroscopy, low-temperature, and high-field techniques.
Contact: Andreas Baum, Rudi Hackl, Mathias Weiler
- suitable as
- Bachelor’s Thesis Physics
- Supervisor: Rudolf Hackl