題目： Recent progress on magnetization dissipation in complex magnetic nanostructures
報告人：袁喆 教授（北京師范大學物理學系高等量子研究中心） 
時  間：2018年11月3日(周六)下午2:00
地  點：北京理工大學中心教學樓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.

簡歷：
袁喆，在清華大學物理系就讀本科和研究生；獲瑞典Chalmers理工大學博士學位；隨后在中科院物理研究所，荷蘭Twente大學，德國Mainz大學等機構工作；2015年入職北京師范大學；主要從事量子自旋輸運、納米光學等凝聚態物理的理論與第一原理計算研究。

聯系方式：物理學院辦公室 （68912131）
邀請人：姚裕貴 教授
網    址：http://physics.bit.edu.cn/