Spin Hall effect-controlled magnetization dynamics in NiMnSb

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4907240· OSTI ID:22410122

Ranjbar, M. ^[1]; Gerhard, F.; Gould, C.; Molenkamp, L. W. ^[2]; Åkerman, J. ^[1]

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1. Department of Physics, University of Gothenburg, 412 96 Gothenburg (Sweden)
2. Physikalisches Institut (EP3), Universität Würzburg, 97074 Würzburg (Germany)

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.

• OSTI ID: 22410122
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ANTIMONY ADDITIONS
DIRECT CURRENT
FERROMAGNETIC MATERIALS
FERROMAGNETIC RESONANCE
FERROMAGNETISM
HALL EFFECT
HEUSLER ALLOYS
LAYERS
LINE WIDTHS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE ALLOYS
NICKEL ALLOYS
OSCILLATIONS
OSCILLATORS
PLATINUM
SPIN