Title
A Mean-Field Model for Spin Dynamics in Multilayered Ferromagnetic Media
Abstract
AbstractIn this paper, we develop a mean-field model for describing the dynamics ofspin-transfer torque in multilayered ferromagnetic media. Specifically,we use the techniques of Wigner transform and moment closure to connectthe underlying physics at different scales and reach a macroscopic model for thedynamics of spin coupled with the magnetization within the material. This providesa further understanding of the linear response model proposed byZhang, Levy, and Fert [Phys. Rev. Lett., 88 (2002), 236601], and in particular we get an extra relaxation term whichhelps to stabilize the system. We develop efficient numerical methodsto overcome the stiffness appearing in this new mean-field model and present severalexamples to analyze and show its validity.
Year
DOI
Venue
2015
10.1137/140953149
Periodicals
Keywords
Field
DocType
spin-transfer torque,spin-magnetization coupling,moment closure,magnetization reversal
Statistical physics,Ferromagnetism,Spin-½,Torque,Mathematical analysis,Moment closure,Magnetization,Mean field theory,Spin-transfer torque,Numerical analysis,Condensed matter physics,Physics
Journal
Volume
Issue
ISSN
13
2
1540-3459
Citations 
PageRank 
References 
0
0.34
2
Authors
3
Name
Order
Citations
PageRank
jingrun chen101.35
Carlos J. García-Cervera262.07
Xu Yang3459.17