Current-driven magnetization dynamics in magnetic trilayers with a tilted spin polarizer
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: email@example.com
Revised: 4 December 2009
Published online: 15 January 2010
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.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010