Spin transfer by nonuniform current injection into a nanomagnet

被引：29

作者：

Ozatay, O. ^{[1
]}

Emley, N. C. ^{[1
]}

Braganca, P. M. ^{[1
]}

Garcia, A. G. F. ^{[1
]}

Fuchs, G. D. ^{[1
]}

Krivorotov, I. N. ^{[1
]}

Buhrman, R. A. ^{[1
]}

Ralph, D. C. ^{[1
]}

机构：

[1] Cornell Univ, Ithaca, NY 14853 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 20期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2206683

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have used nanofabrication techniques to incorporate an similar to 20-30 nm diameter nanoaperture within a 150x250 nm(2) elliptical magnetic multilayer to enable the localized injection of spin-polarized currents into a thin film nanomagnet. This results in very low spin transfer currents being required for at least partial nanomagnet reversal as well as for onset of dynamic precession. Micromagnetic simulations using Landau-Liftshitz-Gilbert equation with a spin-torque term indicate that reversal occurs via domain nucleation at the injection site followed by domain wall propagation away from the aperture, with the nanomagnet ending in one of several different states depending upon the current amplitude.

引用

页数：3

共 21 条

[1] Effect of interfaces on Gilbert damping and ferromagnetic resonance linewidth in magnetic multilayers [J].