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Spin Hall effect-controlled magnetization dynamics in NiMnSb

Journal article
Authors Philipp Dürrenfeld
F. Gerhard
Mojtaba Ranjbar
C. Gould
L. W. Molenkamp
Johan Åkerman
Published in Journal of Applied Physics
Volume 117
Issue 17
ISSN 0021-8979
Publication year 2015
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1063/1.4907240
Subject categories Physical Sciences

Abstract

We investigate the influence of a spin current generated from a platinum layer on the ferromagnetic resonance (FMR) properties of an adjacent ferromagnetic layer composed of the halfmetallic half-Heusler material NiMnSb. Spin Hall nano-oscillator devices are fabricated, and the technique of spin torque FMR is used to locally study the magnetic properties as in-plane anisotropies and resonance fields. A change in the FMR linewidth, in accordance with the additional spin torque produced by the spin Hall effect, is present for an applied dc current. For sufficiently large currents, this should yield auto-oscillations, which however are not achievable in the present device geometry.

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