2005/01/31 by Arne Brataas, Yaroslav Tserkovnyak, G. Bauer +1 · 1 citation
Engineering · Physics and Astronomy · #Advanced Memory and Neural Computing #Ferroelectric and Negative Capacitance Devices #Magnetic properties of thin films #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.73.014408
8 pages, 3 figures
arxiv created 2005/09/09 · openalex publication_date 2006/01/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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.