Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 47: Spin Hall Effects and Skyrmions I

MA 47.8: Vortrag

Donnerstag, 23. März 2017, 11:30–11:45, HSZ 04

Current induced manipulation of the staggered magnetization of an antiferromagnet — •Stanislav Bodnar, Martin Jourdan, Hans-Joachim Elmers, and Mathias Kläui — Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

Novel concepts for ultrafast spintronics rely on antiferromagnets (AFMs), e.g. by employing the direction of their staggered magnetization for data storage. Thus, new approaches for the manipulation of the AFM spin-orientation beyond magnetic fields need to be established. Considering the tetragonal AFM compound Mn2Au, current densities of 108-109 A/cm2 were estimated to reorient the spin-axis via spin-orbit torques [Zel14]. We prepared epitaxial thin films of Mn2Au [Jou15] and investigated the possibility to reorient the antiferromagnetic domains by the application of short current pulses. Our measurements of the planar Hall effect and longitudinal resistance of these sample show clear dependencies on the direction of previously applied current pulses, thus provided strong evidence for current induced manipulation of the Néel vector.

[Zel14]*J. Železný, H. Gao, K. Výborný, J. Zemen, J. Mašek, A. Manchon, J. Wunderlich, J. Sinova, T. Jungwirth, Phys. Rev. Lett. 113, 157201 (2014). [Jou15] M. Jourdan, H. Bräuning, A. Sapozhnik, H.-J. Elmers, H. Zabel and M. Kläui, J. Phys. D: Appl. Phys. 48, 385001 (2015).