Eur. Phys. J. B 73, 417-421 (2010)
https://doi.org/10.1140/epjb/e2010-00007-8

Current-driven magnetization dynamics in magnetic trilayers with a tilted spin polarizer

¹ College of Physics and Microelectronics Science and Micro-Nanotechnologies Research Center, Hunan University, Changsha 410082, P.R. China
² Department of Applied Physics and School of Information Engineering, Hebei University of Technology, Tianjin 300401, P.R. China

Corresponding author: pbhe1026@yahoo.com.cn

Received: 29 September 2009
Revised: 4 December 2009
Published online: 15 January 2010

Abstract

The magnetization dynamics is studied theoretically in the tilted-polarizer magnetic trilayers. Utilizing stability analysis, we obtain the phase diagrams in the plane defined by the current density and the direction of pinned-layer magnetization. With the pinned-layer magnetization oriented in a certain range, one can realize different magnetic states, such as quasi-parallel and quasi-antiparallel stable states, in-plane and out-of-plane precessions, and out-of-plane stable states by varying the current. We find that the free-layer magnetization prefers reversal for small deviation of the fixed-layer magnetization from the film plane, while precession for big deviation.