报告题目（Title）：反铁磁畴壁动力学（Antiferromagnetic domain wall dynamics）
报 告 人（Speaker）：袁怀洋 博士（南方科技大学）
报告时间（Time）：2018年11月22日（周四）10:00
报告地点（Place）：校本部G309
邀请人（inviter）：颜明
报告摘要（Abstract）：Antiferromagnets (AFM) have attracted significant research interests in recent years due to its prior stability and fast dynamics compared with the ferromagnets. Various aspects such as spin transfer torque, anisotropic magnetoresistance, spin current transport and domain wall dynamics has been studied both experimentally and theoretically. The precise and desirable control of an AFM requires a clear understanding of the dynamics of magnetic moments in an AFM. Up till now, no consensus has been reached on the dynamic equations of an AFM, especially the proper form of dissipative torques. In this talk, I will present a new set of dynamic equations that govern the dynamics of an AFM, which feature new dissipative torques from the inter-sublattice drag effect. The first-principles results on the magnetic damping that confirm our theoretical predictions and the influence of the novel dissipative torques on the motion of magnetic domain walls are further addressed.
