Berlin 2018 – wissenschaftliches Programm
MA 21.17: Poster
Dienstag, 13. März 2018, 09:30–13:00, Poster A
Ferromagnetic Resonance of Co2MnGa Thin Films — •Peter Swekis1,2, Anastasios Markou1, Yi-Cheng Chen1, Jörg Sichelschmidt1, Stefan Klingler3,4, Mathias Weiler3,4, Sebastian T.B. Gönnenwein2, and Claudia Felser1 — 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany — 2TU Dresden, Institute of Solid State Physics, Helmholzstr. 40, 01069 Dresden, Germany — 3Walther Meißner Institute, Walther-Meißner-Straße 8, 85748 Garching, Germany — 4TU München, Physics-Department, 85748 Garching, Germany
Heusler compounds are a widely studied class of materials interesting for spintronic applications due to a number of magnetic and electronic properties, such as high spin polarization and elevated Curie temperatures. The dynamic response to gigahertz frequencies becomes particularly interesting and has to be investigated in relevant structures. We studied Co2MnGa thin films of various thicknesses (10-80 nm) with cavity FMR (X-Band) as well as broadband FMR to determine damping, g-factor, effective magnetization and anisotropy constants. First results show a trend of all parameters with changing thickness. Furthermore, we observed unusual oscillating behavior of the broadband FMR linewidth with frequency as well as 8-fold symmetry of the anisotropy in cavity FMR in-plane measurements.