题目： Recent progress on magnetization dissipation in complex magnetic nanostructures
报告人：袁喆 教授（北京师范大学物理学系高等量子研究中心） 
时  间：2018年11月3日(周六)下午2:00
地  点：北京理工大学中心教学楼501

摘要：
In this talk, I will review our recent first-principles scattering calculations [1] 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 [2, 3] and antiferromagnetic materials [4], 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 [5], which essentially unify the present phenomenological theories in literature.

References:
1.A.A. Starikov, Y. Liu, Z. Yuan, and P.J. Kelly, Phys. Rev. B 97, 214415 (2018).
2.Z. Yuan, K.M.D. Hals, Y. Liu, A.A. Starikov, A. Brataas, and P.J. Kelly, Phys. Rev. Lett. 113, 266603 (2014).
3.H. Y. Yuan, Z. Yuan, K. Xia, and X.R. Wang, Phys. Rev. B 94, 064415 (2016).
4.Q. Liu, H.Y. Yuan, K. Xia, and Z. Yuan, Phys. Rev. Materials 1, 061401R (2017).
5.H. Y. Yuan, Q. Liu, K. Xia, Z. Yuan, and X.R. Wang, arXiv:1801.00217.

简历：
袁喆，在清华大学物理系就读本科和研究生；获瑞典Chalmers理工大学博士学位；随后在中科院物理研究所，荷兰Twente大学，德国Mainz大学等机构工作；2015年入职北京师范大学；主要从事量子自旋输运、纳米光学等凝聚态物理的理论与第一原理计算研究。

联系方式：物理学院办公室 （68912131）
邀请人：姚裕贵 教授
网    址：http://physics.bit.edu.cn/