%X We report current-induced spin torques in epitaxial NiMnSb films on a commercially available epiready GaAs substrate. The NiMnSb was grown by cosputtering from three targets using optimized parameters. The films were processed into microscale bars to perform current-induced spin-torque measurements. Magnetic dynamics were excited by microwave currents, and electric voltages along the bars were measured to analyze the symmetry of the current-induced torques. We found that the extracted symmetry of the spin torques matches those expected from spin-orbit interaction in a tetragonally distorted half-Heusler crystal. Both fieldlike and dampinglike torques are observed in all the samples characterized, and the efficiency of the current-induced torques is comparable to that of ferromagnetic metal/heavy-metal bilayers.
%A N Zhao
%A A Sud
%A H Sukegawa
%A S Komori
%A K Rogdakis
%A K Yamanoi
%A J Patchett
%A JWA Robinson
%A C Ciccarelli
%A H Kurebayashi
%J Physical Review Materials
%O This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
%L discovery10121776
%V 5
%D 2021
%K Spin dynamics, Spin texture, Spin torque, Spintronics
%N 1
%T Growth, strain, and spin-orbit torques in epitaxial Ni-Mn-Sb films sputtered on GaAs