Domain wall dynamics driven by a circularly polarized magnetic field in ferrimagnet:effect of Dzyaloshinskii-Moriya interaction  

作　　者：Ting-Ting Liu Yi-Fei Hu Yang Liu Zhe-Jun-Yu Jin Zheng-Hua Tang Ming-Hui Qin 

机构地区：[1]Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou,510006,China [2]School of Physics and Electronic and Electrical Engineering,Xiangnan University,Chenzhou,423000,China

出　　处：《Rare Metals》2022年第11期3815-3822,共8页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51971096);the National Natural Science Foundation of Guangdong Province(No.2019A1515011028);Guangdong Basic and Applied Basic Research Foundation(No.2022A1515011727);the National College Students'Innovation and Entrepreneurship Training Program(No.202110574049)。

摘　　要：In this work,we study the domain wall motion in ferrimagnet driven by a circularly polarized magnetic field using the collective coordinate theory and atomistic micromagnetic simulations,and we pay particular attention to the effect of Dzyaloshinskii-Moriya interaction(DMI).Similar to the case of antiferromagnetic domain wall,ferrimagnetic wall moves at a speed which is linearly dependent on the DMI magnitude.In addition,it is revealed that the DMI plays a role in modulating the domain wall dynamics similar to that of the net spin density,which suggests another internal parameter for controlling domain wall in ferrimagnets.Moreover,the results show that the domain wall dynamics in ferrimagnets is much faster than that in ferromagnets,which confirms again the great potential of ferrimagnets in future spintronic applications.

关 键 词：Domain wall dynamics SPINTRONICS Circularly polarized magnetic field FERRIMAGNETS 

分 类 号：TM228[一般工业技术—材料科学与工程]