Dresden 2014 – scientific programme
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MA: Fachverband Magnetismus
MA 3: Spin Hall Effects
MA 3.2: Talk
Monday, March 31, 2014, 09:45–10:00, HSZ 403
Temperature dependence of the spin Hall magnetoresistance in YIG / Pt hybrids — •Sibylle Meyer1, Matthias Althammer1, Stephan Geprägs1, Matthias Opel1, Rudolf Gross1, 2, and Sebastian T. B. Goennenwein1 — 1Walther - Meißner - Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik - Department, Technische Universität München, 85748 Garching, Germany
The generation and detection of pure spin currents represents a new
paradigm for spin electronics. Within the last two years, the spin Hall magnetoresistance (SMR), a novel type of magnetoresistance based on the interplay between spin and charge transport in ferromagnetic insulator/normal metal hybrids, has become a powerful tool to access the spin transport properties of normal metals.
Here we study the temperature dependence of the SMR in Y3Fe5O12/Pt hybrid structures via magnetization orientation dependent magnetoresistance measurements. Our experiments show that the SMR amplitude decreases with decreasing temperature, which can be modeled in terms of a spin Hall angle in Pt decreasing from 0.11 at room temperature to 0.075 at 10 K, while the spin diffusion length and the spin mixing conductance of the ferrimagnetic insulator/normal metal interface remain almost constant.
Financial support by the Deutsche Forschungsgemeinschaft via SPP 1538 (project no. GO 944/4) and the German Excellence Initiative via the "Nanosystems Initiative Munich (NIM)" is gratefully acknowledged.