Impact of the crystal orientation on spin-orbit torques in Fe/Pd bilayers
arXiv:1911.05487 · doi:10.1088/1361-6463/ab8ed9
Abstract
Spin-orbit torques in ferromagnetic (FM)/non-magnetic (NM) heterostructures offer more energy-efficient means to realize spin-logic devices; however, their strengths are determined by the heterostructure interface. This work examines crystal orientation impact on the spin-orbit torque efficiency in different Fe/Pd bilayer systems. Spin torque ferromagnetic measurements evidence that the damping-like torque efficiency is higher in epitaxial than in polycrystalline bilayer structures while the field-like torque is negligible in all bilayer structures. The strength of the damping-like torque decreases with deterioration of the bilayer epitaxial quality. The present finding provides fresh insight for the enhancement of spin-orbit torques in magnetic heterostructures.
arXiv comment8 Pages, 4 figures, 1 Table, epitaxial heterostructures for spin-oscillators
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