Numerical study on the magnetization dynamics of a SAF under perpendicular spin-polarized current

Author

Firastrau, I. ; Adam, M.S. ; Pop, M.-I.

Author_Institution

Transilvania Univ. of Brasov, Brasov, Romania

Volume

2

fYear

2011

fDate

17-19 Oct. 2011

Firstpage

387

Lastpage

390

Abstract

By solving the Landau-Lifschitz-Gilbert equation in the macrospin approach we have analysed the free-layer magnetization dynamics of a perpendicular polarizer - planar SAF free layer spin-torque oscillator at 0K temperature. The current-field state diagram obtained exhibits three different behaviors: a stable in-plane alignment of the two SAF´s layers magnetizations for low current densities (J); an incoherent dynamics state for large J and a dynamic state where simultaneous out-of-plane magnetization precessions of the two SAF layers occur for vast ranges of fields and currents. This large dynamical region is very interesting for applications.

Keywords

antiferromagnetic materials; current density; magnetisation; numerical analysis; oscillators; spin polarised transport; Landau-Lifschitz-Gilbert equation; SAF layer magnetizations; current densities; current-field state diagram; dynamical region; free-layer magnetization dynamics; incoherent dynamics state; macrospin approach; out-of-plane magnetization precessions; perpendicular polarizer; perpendicular spin-polarized current; planar SAF free layer spin-torque oscillator; stable in-plane alignment; Couplings; Current density; Magnetic tunneling; Magnetization; Mathematical model; Oscillators; Saturation magnetization; Numerical simulations; Spintorque oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Semiconductor Conference (CAS), 2011 International

Conference_Location

Sinaia

ISSN

1545-827X

Print_ISBN

978-1-61284-173-1

Type

conf

DOI

10.1109/SMICND.2011.6095825

Filename

6095825