Spin Hall magnetoresistance in a canted ferrimagnet
Kathrin Ganzhorn (Technische Universität München, Bayerische Akademie der Wissenschaften)
Joseph Barker (Tohoku University)
Richard Schlitz (Technische Universität München, Bayerische Akademie der Wissenschaften)
Benjamin A. Piot (Université Grenoble Alpes)
Katharina Ollefs (Universität Duisburg-Essen, European Synchrotron Radiation Facility (ESRF))
Francois Guillou (European Synchrotron Radiation Facility (ESRF))
Fabrice Wilhelm (European Synchrotron Radiation Facility (ESRF))
Andrei Rogalev (European Synchrotron Radiation Facility (ESRF))
Gerrit E W Bauer (TU Delft - Applied Sciences, Tohoku University, Kavli institute of nanoscience Delft)
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Abstract
We study the spin Hall magnetoresistance effect in ferrimagnet/normal metal bilayers, comparing the response in collinear and canted magnetic phases. In the collinear magnetic phase, in which the sublattice magnetic moments are all aligned along the same axis, we observe the conventional spin Hall magnetoresistance. In contrast, in the canted phase, the magnetoresistance changes sign. Using atomistic spin simulations and x-ray absorption experiments, we can understand these observations in terms of the magnetic field and temperature dependent orientation of magnetic moments on different magnetic sublattices. This enables a magnetotransport based investigation of noncollinear magnetic textures.