Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.48: Poster

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

Spin Hall magnetoresistance in erbium iron garnet — •Hiroto Sakimura¹, Michaela Lammel¹, Matthias Althammer¹, Stephan Geprägs¹, Rudolf Gross^1,2, and Sebastian T. B. Goennenwein^1,2 — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — ²Fakultät für Physik, Technische Universität München, Garching, Germany

The interconversion of spin and charge currents via the (inverse) spin Hall effect in normal metal (NM)/ferromagnetic insulator (FMI) bilayers leads to the spin Hall magnetoresistance (SMR). The SMR manifests itself in the dependence of the electrical resistivity of the NM layer on the magnetization orientation of the FMI. By using erbium iron garnet (Er₃Fe₅O₁₂, ErIG) as the ferrimagnetic insulator with a magnetic compensation point at 78 K, further insight on the dependence of the SMR on the sub-lattice magnetizations can be obtained. Here we report on the fabrication of ErIG/Pt bilayers on (100)-oriented Gd₃Fe₅O₁₂ and Y₃Al₅O₁₂ substrates by pulsed laser deposition and subsequent electron beam evaporation. High crystalline quallity of our thin films is confirmed by X-ray diffraction measurement. The compensation temperatures of the thin films observed by SQUID magnetometry were close to the bulk value. The temperature dependence of the SMR in these ErIG/Pt bilayers shows a decrease of the SMR amplitude at the compensation point, suggesting a complex interplay of the different magnetic sub-lattices for the SMR. - This work is supported by the DFG via SPP 1538.