Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 66: Spintronics (joint session MA/TT)
TT 66.1: Vortrag
Mittwoch, 14. März 2018, 15:00–15:15, EB 202
Spin Hall Magnetoresistance in uniaxial antiferromagnet/Pt heterostructures — •Richard Schlitz1,2, Tobias Kosub3, Andy Thomas4, Kornelius Nielsch4,5, Denys Makarov3, and Sebastian T.B. Goennenwein1, 2 — 1Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden, Germany — 2Center for Transport and Devices of Emergent Materials, TU Dresden, 01062 Dresden, Germany — 3Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany — 4Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden), Institute for Metallic Materials, 01069 Dresden, Germany — 5TU Dresden, Institute of Materials Science, 01062 Dresden, Germany
Antiferromagnets recently attracted a lot of interest as candidate materials for spintronic applications. In this study, we investigate the spin Hall magnetoresistance (SMR) in uniaxial antiferromagnet (AFM)/Pt bilayers. Our results suggest that experiments close to the Neel temperature of the AFM layer allow to study the magnetic phase diagram of the AFM. By rotating the magnetic field in three orthogonal rotation planes, we establish the 3D fingerprint of the SMR also in AFM/Pt heterostructures, giving further insights into the impact of anisotropy and domain pattern. Finally, we propose an extension of the monodomainization model put forward recently in conjunction with measurements on NiO/Pt heterostructures [1] which provides an alternative explanation on the origin of the negative SMR signature.
[1] J. Fischer et al., arxiv:1709.04158 (2017)