报告题目：复杂磁纳米结构中磁化强度动力学的新进展
（Recent progress on magnetization dynamics of complex magnetic nanostructures）
报 告 人：袁喆 研究员 （北京师范大学）
报告时间：2017年12月22日（周五）10:00
报告地点：校本部G309
邀请人： 颜明
报告摘要：
In this talk, I will review our recent first-principles scattering calculations of magnetization dissipation in complex magnetic nanostructures that form the active parts of spintronics devices. By calculating the magnetic damping in the multilayers consisting of ferromagnetic and nonmagnetic thin films, ferromagnetic domain walls [1, 2] and antiferromagnetic materials [3], we present the generalized spin pumping theory in the above systems, where rich physics has been generated by the pumped spin current associated with the dynamic motion of local magnetization. For antiferromagnetic materials, we have developed rigorous dynamical equations of magnetization dynamics [4], which essentially unify the present phenomenological theories in literature. I will also discuss possible applications of magnetic nanostructures in neuromorphic computing.
References:
1. Z. Yuan, K.M.D. Hals, Y. Liu, A.A. Starikov, A. Brataas, and P.J. Kelly, Phys. Rev. Lett. 113, 266603 (2014).
2. H. Y. Yuan, Z. Yuan, K. Xia, and X.R. Wang, Phys. Rev. B 94, 064415 (2016).
3. Q. Liu, H.Y. Yuan, K. Xia, and Z. Yuan, Phys. Rev. Materials 1, 061401R (2017).
4. H. Y. Yuan, Q. Liu, K. Xia, Z. Yuan, and X.R. Wang, Submitted.
