Simulation of spin transport and magnetization dynamics in FNF structures within a drift-diffusion model

Author

Wenin, Markus ; Pötz, Walter

Author_Institution

Theor. Div., Karl Franzens Univ. Graz, Graz, Austria

fYear

2010

fDate

26-29 Oct. 2010

Firstpage

1

Lastpage

4

Abstract

We present a self-consistent simulation of the magnetization dynamics and the spin dynamics in ferromagnetic/normal/ferromagnetic (FNF) heterostructures. We use a spin drift-diffusion equation (SDDE) and the Landau-Lifshitz-Gilbert equation (LLGE) to compute the coupled dynamic of both conduction (spin-) carriers and localized magnetic moments. Deriving a complete analytic solution of the stationary SDDE we develop a fast and robust method to compute the spin-torque in the LLGE. Optimal control theory is used to compute time-dependent electric current profiles to switch the magnetization in specified time. Uniqueness of the optimal solution is discussed.

Keywords

Landau levels; SCF calculations; ferromagnetic materials; magnetic moments; magnetisation; optimal control; spin dynamics; spin polarised transport; FNF structures; Landau-Lifshitz-Gilbert equation; conduction carriers; drift-diffusion model; ferromagnetic-normal-ferromagnetic heterostructures; localized magnetic moments; magnetization dynamics; optimal control theory; self-consistent simulation; spin drift-diffusion equation; spin dynamics; spin torque; spin transport; time-dependent electric current profiles; Anisotropic magnetoresistance; Current; Equations; Magnetization; Mathematical model; Switches; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational Electronics (IWCE), 2010 14th International Workshop on

Conference_Location

Pisa

Print_ISBN

978-1-4244-9383-8

Type

conf

DOI

10.1109/IWCE.2010.5677991

Filename

5677991