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.
Original language | English |
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Article number | 217204 |
Journal | Physical review letters |
Volume | 108 |
Issue number | 21 |
DOIs | |
Publication status | Published - 2012 May 23 |
ASJC Scopus subject areas
- Physics and Astronomy(all)