Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

doi:10.1088/1674-1056/27/6/067501

中国物理B ›› 2018, Vol. 27 ›› Issue (6): 67501-067501.doi: 10.1088/1674-1056/27/6/067501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

Zhou-Zhou Sun(孙周洲), Yu Yang(杨玉), J Schliemann

1 College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China;
2 Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany

收稿日期:2018-01-25 修回日期:2018-04-04 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: Zhou-Zhou Sun E-mail:phzzsun@suda.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.11274236) and the Deutsche Forschungsgemeinschaft via SFB 689.

Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

Zhou-Zhou Sun(孙周洲)¹, Yu Yang(杨玉)¹, J Schliemann²

1 College of Physics, Optoelectronics and Energy, Soochow University, Suzhou 215006, China;
2 Institute for Theoretical Physics, University of Regensburg, D-93040 Regensburg, Germany

Received:2018-01-25 Revised:2018-04-04 Online:2018-06-05 Published:2018-06-05
Contact: Zhou-Zhou Sun E-mail:phzzsun@suda.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.11274236) and the Deutsche Forschungsgemeinschaft via SFB 689.

摘要/Abstract

摘要： We investigate magnetization reversal of two-body uniaxial Stoner particles, by injecting spin-polarized current through a spin-valve structure. The two-body Stoner particles perform synchronized dynamics and can act as an information bit in computer technology. In the presence of magnetic dipole-dipole interaction (DDI) between the two particles, the critical switching current I_c for reversing the two dipoles is analytically obtained and numerically verified in two typical geometric configurations. The I_c bifurcates at a critical DDI strength, where I_c can decrease to about 70% of the usual value without DDI. Moreover, we also numerically investigate the magnetic hysteresis loop, magnetization self-precession, reversal time and synchronization stability phase diagram for the two-body system in the synchronized dynamics regime.

关键词: magnetization reversal, spin-polarized current, Stoner particle

Abstract: We investigate magnetization reversal of two-body uniaxial Stoner particles, by injecting spin-polarized current through a spin-valve structure. The two-body Stoner particles perform synchronized dynamics and can act as an information bit in computer technology. In the presence of magnetic dipole-dipole interaction (DDI) between the two particles, the critical switching current I_c for reversing the two dipoles is analytically obtained and numerically verified in two typical geometric configurations. The I_c bifurcates at a critical DDI strength, where I_c can decrease to about 70% of the usual value without DDI. Moreover, we also numerically investigate the magnetic hysteresis loop, magnetization self-precession, reversal time and synchronization stability phase diagram for the two-body system in the synchronized dynamics regime.

Key words: magnetization reversal, spin-polarized current, Stoner particle

中图分类号: (Magnetization reversal mechanisms)

75.60.Jk

75.75.-c (Magnetic properties of nanostructures) 85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

孙周洲, 杨玉, J Schliemann. Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction[J]. 中国物理B, 2018, 27(6): 67501-067501.

Zhou-Zhou Sun(孙周洲), Yu Yang(杨玉), J Schliemann. Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction[J]. Chin. Phys. B, 2018, 27(6): 67501-067501.

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Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

Current-induced synchronized magnetization reversal of two-body Stoner particles with dipolar interaction

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