Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ

doi:10.1088/1674-1056/27/9/098504

中国物理B ›› 2018, Vol. 27 ›› Issue (9): 98504-098504.doi: 10.1088/1674-1056/27/9/098504

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ

Mao-Sen Yang(杨茂森), Liang Fang(方粮), Ya-Qing Chi(池雅庆)

1 State Key Laboratory of High-Performance Computing, College of Computer, National University of Defense Technology, Changsha 410073, China;
2 Institute of Microelectronics, College of Computer, National University of Defense Technology, Changsha 410073, China

收稿日期:2018-05-01 修回日期:2018-06-07 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: Liang Fang E-mail:lfang@nudt.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61332003) and the Natural Science Foundation of Hunan Province, China (Grant No. 2015JJ3024).

Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ

Mao-Sen Yang(杨茂森)¹, Liang Fang(方粮)¹, Ya-Qing Chi(池雅庆)²

1 State Key Laboratory of High-Performance Computing, College of Computer, National University of Defense Technology, Changsha 410073, China;
2 Institute of Microelectronics, College of Computer, National University of Defense Technology, Changsha 410073, China

Received:2018-05-01 Revised:2018-06-07 Online:2018-09-05 Published:2018-09-05
Contact: Liang Fang E-mail:lfang@nudt.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61332003) and the Natural Science Foundation of Hunan Province, China (Grant No. 2015JJ3024).

摘要/Abstract

摘要：

We investigate the dependence of the switching process on the perpendicular magnetic anisotropy (PMA) constant in perpendicular spin transfer torque magnetic tunnel junctions (P-MTJs) using micromagnetic simulations. It is found that the final stable states of the magnetization distribution of the free layer after switching can be divided into three different states based on different PMA constants:vortex, uniform, and steady. Different magnetic states can be attributed to a trade-off among demagnetization, exchange, and PMA energies. The generation of the vortex state is also related to the non-uniform stray field from the polarizer, and the final stable magnetization is sensitive to the PMA constant. The vortex and uniform states have different switching processes, and the switching time of the vortex state is longer than that of the uniform state due to hindrance by the vortex.

关键词: magnetic tunnel junction, perpendicular magnetic anisotropy, vortex state, micromagnetic simulation

Abstract:

Key words: magnetic tunnel junction, perpendicular magnetic anisotropy, vortex state, micromagnetic simulation

中图分类号: (Magnetic memory using magnetic tunnel junctions)

85.75.Dd

85.70.Ay (Magnetic device characterization, design, and modeling) 75.78.Cd (Micromagnetic simulations ?) 74.25.Ha (Magnetic properties including vortex structures and related phenomena)

杨茂森, 方粮, 池雅庆. Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ[J]. 中国物理B, 2018, 27(9): 98504-098504.

Mao-Sen Yang(杨茂森), Liang Fang(方粮), Ya-Qing Chi(池雅庆). Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ[J]. Chin. Phys. B, 2018, 27(9): 98504-098504.

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Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ

Dependence of switching process on the perpendicular magnetic anisotropy constant in P-MTJ

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