Spin Hall magnetoresistance in the non-collinear ferrimagnet GdIG close to the compensation temperature

Bo-Wen Dong, Joel Cramer, Kathrin Ganzhorn, H. Y. Yuan, Er-Jia Guo, Sebastian T. B. Goennenwein & Mathias Kläui
We investigate the spin Hall magnetoresistance (SMR) in a gadolinium iron garnet (GdIG)/platinum (Pt) heterostructure by angular dependent magnetoresistance measurements. The magnetic structure of the ferromagnetic insulator GdIG is non-collinear near the compensation temperature, while it is collinear far from the compensation temperature. In the collinear regime, the SMR signal in GdIG is consistent with the usual sin(2)theta relation well established in the collinear magnet yttrium iron garnet, with theta the angle between magnetization and...
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