Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 64: Poster 1
MA 64.26: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-EG
Spin Hall Magnetoresistance in Canted Ferrimagnets — •Richard Schlitz1,2,3, Kathrin Ganzhorn1,3, Matthias Opel1, Matthias Althammer1,3, Stephan Geprägs1, Hans Huebl1,3,4, Rudolf Gross1,3,4, and Sebastian T. B. Goennenwein1,2,3,4 — 1Walther-Meißner-Institut, Garching, Germany — 2Technische Universität Dresden, Dresden, Germany — 3Technische Universität München, Garching, Germany — 4Nanosystems Initiative Munich, München, Germany
The spin Hall magnetoresistance (SMR) results from the interplay of spin and charge currents and, thus, is a valuable tool for studying the spin structure in ferromagnetic insulator (FMI)|normal metal bilayers.
The accepted model for SMR suggests that the metal’s resistance only depends on the direction of the net magnetization of the FMI. To test this, we study rare earth iron garnet|platinum (REIG|Pt) hybrid structures featuring different magnetic sublattices with a magnetic compensation point. Thus, we can investigate the SMR in a non-collinear spin configuration where the sublattice magnetizations are not aligned with one another or the external magnetic field.
In contrast to the predictuion of present models, our studies reveal a dependence of the SMR on the magnetic sublattice orientations. In particular, we observe a sign inversion of the SMR close to the magnetic compensation temperature. We discuss these findings in comparison to atomistic spin simulations and X-ray magnetic circular dichroism experiments1.
[1] K. Ganzhorn et al., Physical Review B 94, 094401 (2016)