Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.13: Poster
Wednesday, March 18, 2020, 15:00–18:00, P3
Spin Torques in Coupled YIG/Py Heterostructures — •Carolina Lüthi1,2, Luis Flacke1,2, Hans Huebl1,2,3, Matthias Althammer1,2, Rudolf Gross1,2,3, and Mathias Weiler1,2 — 1Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, Technische Universität München, Germany — 3Nanosystems Initiative Munich, Germany
Modern spin-wave technology aims to encode and transport information using the electron spin-angular momentum. In this field, the ferrimagnetic insulator yttrium iron garnet (YIG) has numerous applications due to its low intrinsic Gilbert damping. We investigate spin dynamics due to interfacial spin torques in YIG/NiFe thin film heterostructures by broadband ferromagnetic resonance (FMR) spectroscopy. We observe an efficient excitation of perpendicular standing spin waves in the YIG layer, in agreement with our earlier findings [1]. Additionally, for oblique orientations of the external magnetic field and at cryogenic temperatures, we observe exchange-modes which hybridize with the FMR modes of Py and YIG. We study their dynamics as a model system for hybrid excitations in magnetic heterostructures.
Financial support by the DFG via project WE5386/5-1 is acknowledged.
[1] Stefan Klingler et al., Phys. Rev. 120: 127201 (2018)