Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.35: Poster

Donnerstag, 10. März 2016, 15:00–18:00, Poster B1

Electrically detected FMR in the field-polarized phase of Cu₂OSeO₃ — •Stefan Weichselbaumer^1,2, Ioannis Stasinopoulos¹, Andreas Bauer³, Helmuth Berger⁴, Johannes Waizner⁵, Markus Garst⁵, Christian Pfleiderer³, and Dirk Grundler^1,6 — ¹Physik-Department E10, TU München, Garching, Germany — ²Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ³Physik-Department, FG Magnetische Materialien, TU München, Garching, Germany — ⁴EPFL, Institut de physique de la matiere complexe, Lausanne, Switzerland — ⁵Institute for Theoretical Physics, Univ. Köln, Köln, Germany — ⁶LMGN, IMX, EPFL, Lausanne, Switzerland

The insulating chiral magnet Cu₂OSeO₃ recently gained a lot of interest as it exhibits a Skyrmion lattice and spin helix phase. The insulating nature of this material as well as the magnetoelectric coupling could lead to efficient spin-based devices. We investigate collective excitations in the field-polarized ferrimagnetic phase of Cu₂OSeO₃ using a broadband spectroscopy setup based on a vector network analyzer. By evaporating a thin Pt layer on our sample and measuring the voltage across the Pt stripe, we are able to electrically detect the ferromagnetic resonance (FMR) signal. We observe a significant influence of heating effects due to microwave irradiation. Our analysis shows that several effects contribute to the signal, including the spin rectification effect (SR) and spin pumping (SP). Financial support by the DFG via TRR80 is acknowledged.