Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 64: Poster 1

MA 64.27: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-EG

Spin Hall magnetoresistance using antiferromagnetic insulators — •Johanna Fischer^{1, 2}, Stephan Geprägs¹, Kathrin Ganzhorn^{1, 2}, Matthias Opel¹, and Rudolf Gross^{1, 2, 3} — ¹Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — ²Physik-Department, Technische Universität München, 85748 Garching, Germany — ³Nanosystems Initiative Munich, 80799 München, Germany

The phenomena of pure spin currents have mainly been investigated in ferromagnetic insulators/normal metal hybrid structures and give rise to new spintronic effects like the spin Hall magnetoresistance (SMR).[1] As ferromagnets are very sensitive to external magnetic fields, devices based on antiferromagnetic materials may be a better solution for future spintronic applications. We study the possible SMR in heterostructures of epitaxially grown antiferromagnets covered by a thin Pt layer. We measure the angle dependent magnetoresistance in magnetic fields up to 7 T at different temperatures for three rotation planes relative to the field orientation. We discuss the SMR amplitude in terms of the newly discovered sub-lattice SMR model. This work is supported by the DFG via SPP 1538.
M. Althammer et al., Phys. Rev. B 87, 224401 (2013)