Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 56: Spin-Hall effects
MA 56.4: Vortrag
Freitag, 16. März 2018, 10:15–10:30, H 0112
Surface magnetization probed by spin Hall magnetoresistance — •Saül Vélez1,2, Juan Manuel Gomez-Perez1, Miren Isasa1, Edurne Sagasta1, Amilcar Bedoya-Pinto1, Lauren McKenzie-Sell3, Mario Amado3, Jason W. A. Robinson3, Josep Fontcuberta4, Vitaly Golovach5,6, F. Sebastian Bergeret5, Luis E. Hueso1,6, and Felix Casanova1,6 — 1CIC NanoGUNE — 2ETH Zürich — 3University of Cambridge — 4ICMAB-CSIC, UAB — 5CFM-MPC (CSIC-UPV/EHU) and DIPC — 6IKERBASQUE
Spin Hall magnetoresistance (SMR) in heavy metal(HM)/ferromagnetic insulator(FMI) bilayers is a novel effect governed by the spin transport across the HM/FMI interface. I will show the importance of the interface details in SMR in three different FMI systems: spinel CoFe2O4 (with antiphase boundaries) [1], perovskite LaCoO3 (a ferromagnet induced by epitaxial strain) [2] and garnet Y3Fe5O12 (with surface magnetic frustration due to ion-milling [3] or to ultrathin growth [4]). The SMR measurements allow us to extract the complex surface magnetic properties of those films, which are radically different to their bulk counterparts. Our results point SMR as a new powerful tool for probing the magnetic properties of surfaces.
[1] M. Isasa et al., Phys. Rev. Appl. 6, 034007 (2016). [2] S. Vélez et al., submitted. [3] S. Vélez et al., Phys. Rev. B 94, 174405 (2016). [4] J. M. Gómez-Pérez et al., submitted.
*Currently working at ETH Zürich with Prof. Fiebig and Prof. Gambardella.