Spin-Wave Excitation in Magnetic Insulators by Spin-Transfer Torque

Journal article (2012)
Department
QN/Quantum Nanoscience (AS) (TU Delft)
Copyright: American Physical Society
DOI: https://doi.org/doi:10.1103/PhysRevLett.108.217204
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Published Date

23-05-2012

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Source:

Physical Review Letters, 108 (21), 2012

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Abstract

We study the excitation of spin waves in magnetic insulators by the current-induced spin-transfer torque. We predict preferential excitation of surface spin waves induced by an easy-axis surface anisotropy with critical current inversely proportional to the penetration depth and surface anisotropy. The surface modes strongly reduce the critical current and enhance the excitation power of the current-induced magnetization dynamics.

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