Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: POSTER Ib
MA 20.15: Poster
Dienstag, 17. März 2015, 09:30–13:00, Poster A
Anisotropy of anomalous Hall effects in YIG|Pt hybrids — Sibylle Meyer1,2, •Richard Schlitz1,2, Stephan Geprägs1, Matthias Opel1, Hans Huebl1,3, Rudolf Gross1,2,3, and Sebastian T. B. Goennenwein1,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, TU München, 85748 Garching, Germany — 3Nanosystems Initiative Munich, 80799 München, Germany
The generation, manipulation and detection of pure spin currents are fascinating challenges in the field of spintronics.
Recently, the spin Hall magnetoresistance (SMR) effect based on the interplay of spin and charge currents was reported [1]. The SMR allows to determine the imaginary part of the spin mixing interface conductance from measurements of anomalous Hall-type effects (spin Hall anomalous Hall effect, SHAHE [2]).
Here, we present the analysis of ordinary and anomalous Hall signals observed in magnetotransport measurements in yttrium iron garnet|platinum (YIG|Pt) bilayers. We discuss the dependence on film thickness and temperature of the AHE voltage signals in terms of the SHAHE.
Whereas the usual AHE voltage signal observed in metallic ferromagnets depends linearly on the magnetization component M⊥ perpendicular to the film, we observe a more complex AHE-type response in our YIG|Pt samples. In particular, we observe higher order terms ∝ M⊥n at low temperatures.
This work is supported by the DFG via SPP 1538 (GO 944/4).
[1] H. Nakayama et al., Phys. Rev. Lett. 110, 206601 (2013).
[2] Y.-T. Chen et al., Phys. Rev. B 87, 144411 (2013).