Reduced switching current density with an off-centered nanocontact in a confined structure

被引：9

作者：

Li, Huanan ^{[1
,2
]}

Liu, Yan ^{[1
]}

Jia, Min ^{[1
]}

Du, An ^{[1
]}

机构：

[1] Northeastern Univ, Coll Sci, Shenyang 110819, Peoples R China

[2] Jilin Normal Univ, Coll Phys, Siping 136000, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 386卷

基金：

中国国家自然科学基金;

关键词：

Vortex core; Spin-polarized current; Oersted field; SPIN-TORQUE; MAGNETIZATION DYNAMICS;

D O I：

10.1016/j.jmmm.2015.03.055

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the dependence of switching current density and switching time on the nanocontact size and position driven by an out-of-plane spin-polarized current in a confined nanocontact structure using micromagnetic simulations, It is found that the critical switching current density and switching time decrease greatly when the nanocontact shifts from the disk center. The analytical calculations On the basis of Thiele equation demonstrate that the equilibriurn position shift and the instantaneous gyrotropic frequency variation result in these decreases. Our findings present an additional efficient means for ultrafast switching of magnetic vortices. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：8 / 11

页数：4