TY - JOUR
T1 - Current-induced macrospin versus spin-wave excitations in spin valves
AU - Brataas, Arne
AU - Tserkovnyak, Yaroslav
AU - Bauer, Gerrit E.W.
PY - 2006
Y1 - 2006
N2 - The mode dependence of current-induced magnetic excitations in spin valves is studied theoretically. The torque exerted on the magnetization by transverse spin currents as well as the Gilbert damping constant are found to depend strongly on the wavelength of the excitation (spin wave). Analytic expressions are presented for the critical currents that excite a selected spin wave. The onset of macrospin (zero wavelength) vs finite wavelength instabilities depends on the device parameters and the current direction, in agreement with recent experimental findings.
AB - The mode dependence of current-induced magnetic excitations in spin valves is studied theoretically. The torque exerted on the magnetization by transverse spin currents as well as the Gilbert damping constant are found to depend strongly on the wavelength of the excitation (spin wave). Analytic expressions are presented for the critical currents that excite a selected spin wave. The onset of macrospin (zero wavelength) vs finite wavelength instabilities depends on the device parameters and the current direction, in agreement with recent experimental findings.
UR - http://www.scopus.com/inward/record.url?scp=33244474008&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33244474008&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.73.014408
DO - 10.1103/PhysRevB.73.014408
M3 - Article
AN - SCOPUS:33244474008
SN - 0163-1829
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 1
M1 - 014408
ER -