Joule Heating Effect on Field-Free Magnetization Switching by Spin-Orbit Torque in Exchange-Biased Systems

被引：62

作者：

Razavi, Seyed Armin ^{[1
]}

Wu, Di ^{[1
,2
]}

Yu, Guoqiang ^{[1
]}

Lau, Yong-Chang ^{[3
,4
]}

Wong, Kin L. ^{[1
]}

Zhu, Weihua ^{[2
]}

He, Congli ^{[1
]}

Zhang, Zongzhi ^{[2
]}

Coey, J. M. D. ^{[3
,4
]}

Stamenov, Plamen ^{[3
,4
]}

Amiri, Pedram Khalili ^{[1
,5
]}

Wang, Kang L. ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

[2] Fudan Univ, Dept Opt Sci & Engn, Minist Educ, Key Lab Micro & Nano Photon Struct, Shanghai 200433, Peoples R China

[3] Trinity Coll Dublin, CRANN, AMBER, Dublin 2, Ireland

[4] Trinity Coll Dublin, Sch Phys, Dublin 2, Ireland

[5] Inston Inc, Los Angeles, CA 90095 USA

来源：

PHYSICAL REVIEW APPLIED | 2017年 / 7卷 / 02期

基金：

美国国家科学基金会; 爱尔兰科学基金会; 中国国家自然科学基金;

关键词：

LAYER THICKNESS DEPENDENCE; PERPENDICULAR MAGNETIZATION; REVERSAL;

D O I：

10.1103/PhysRevApplied.7.024023

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Switching of magnetization via spin-orbit torque provides an efficient alternative for nonvolatile memory and logic devices. However, to achieve deterministic switching of perpendicular magnetization, an external magnetic field collinear with the current is usually required, which makes these devices inappropriate for practical applications. In this work, we examine the current-induced magnetization switching in a perpendicularly magnetized exchange-biased Pt/CoFe/IrMn system. A magnetic field annealing technique is used to introduce in-plane exchange biases, which are quantitatively characterized. Under proper conditions, field-free current-driven switching is achieved. We study the Joule heating effect, and we show how it can decrease the in-plane exchange bias and degrade the field-free switching. Furthermore, we discuss that the exchange-bias training effect can have similar effects.

引用

页数：11

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