Magnetization Reversal of Single-Molecular Magnets by a Spin-Polarized Current

• 作者: Chao Yang Gang Su Zheng-Chuan Wang
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（8）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL,MAGNETIC, AND OPTICAL PROPERTIES
• 页码范围: 108-113
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/8/087201

摘要

We study the magnetization reversal of single-molecular magnets by a spin-polarized current in the framework of the spinor Boltzmann equation.Because of the spin-orbit coupling,the spin-polarized current will impose a non-zero spin transfer torque on the single-molecular magnets,which will induce the magnetization switching of the latter.Via the s-d exchange interaction between the conducting electrons and single-molecular magnets,we can investigate the magnetization dynamics of single-molecular magnets.We demonstrate the dynamics of the magnetization based on the spin diffusion equation and the Heisenberg-like equation.The results show that when the current is large enough,the magnetization of the single-molecular magnets can be reversed.We also calculate the critical current density required for the magnetization reversal under different anisotropy and external magnetic fields,which is helpful for the corresponding experimental design.