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

作     者：Zhou-Zhou Sun Yu Yang J Schliemann 孙周洲;杨玉;J Schliemann

作者机构：College of Physics Optoelectronics and Energy Soochow University Suzhou 215006 China Institute for Theoretical Physics University of Regensburg D-93040 Regensburg Germany 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第6期

页      面：434-442页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.11274236) the Deutsche Forschungsgemeinschaft via SFB 689 

主　　题：magnetization reversal spin-polarized current Stoner particle 

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 Ic for reversing the two dipoles is analytically obtained and numerically verified in two typical geometric configurations. The Ic bifurcates at a critical DDI strength, where Ic 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.