Current induced switching due to spin-transfer in spin valves: macroscopic model

✍ Scribed by M. Gmitra; J. Barnaś; A. Fert; I. Weymann; V. K. Dugaev

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 164 KB
• Volume: 3
• Category: Article
• ISSN: 1862-6351
• DOI: 10.1002/pssc.200562418

✦ Synopsis

Abstract

We develop a macroscopic description of current‐induced torque due to spin transfer in layered systems consisting of ferromagnetic films separated by a nonmagnetic layer. The description is based on the classical spin diffusion equations for the distribution functions inside the films used in the theory of CPP‐GMR, and macroscopic boundary conditions for the longitudinal and transverse components of the spin current. Due to strong exchange field in ferromagnetic films, we assume that the perpendicular component of spin current is totally absorbed within the narrow interface region giving rise to the torque. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)