合成铁磁多层膜中各向异性层间Dzyaloshinski-Moriya相互作用  

Anisotropic interlayer Dzyaloshinskii-Moriya interactions in synthetic ferromagnetic multilayers

作　　者：陈如意 徐峰 崔琪睿 梁敬华 周永健 王宁 潘峰 薛飞 杨洪新 宋成 Ruyi Chen;Feng Xu;Qirui Cui;Jinghua Liang;Yongjian Zhou;Ning Wang;Feng Pan;Fei Xue;Hongxin Yang;Cheng Song(Key Laboratory of Advanced Materials(MOE),School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Chinese Academy of Sciences,Hefei 230031,China;National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China;Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]Key Laboratory of Advanced Materials(MOE),School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China [2]Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Chinese Academy of Sciences,Hefei 230031,China [3]National Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China [4]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [5]Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

出　　处：《Science Bulletin》2023年第9期878-882,M0003,共6页科学通报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2021YFB3601301,2022YFA1405100,and 2022YFA1403601);the National Natural Science Foundation of China (52225106,12241404,12150011,and 12174405);supported by High Magnetic Field Laboratory of Anhui Province。

摘　　要：Dzyaloshinskii-Moriya相互作用(DMI)在合成磁性多层膜体系和自旋电子技术中扮演着重要的作用.这种非共线相互作用在磁性多层膜体系中包括两种形式:界面DMI和层间DMI.对于界面DMI,其单易轴性和各向异性特征都已被发现,为拓扑自旋的技术发展奠定了基础.然而,到目前为止,有关层间DMI的研究都是单易轴性的,层间DMI的各向异性特征尚未报道.本文结合实验和理论结果,报道了[Co/Pd]多层结构中的各向异性层间DMI,这种层间手性相互作用可引起在互为60°的两个方向上的非对称磁化翻转行为.第一性原理计算表明,层间DMI的各向异性是由面心立方结构中沿(111)面两个能量较低的高对称方向上的面内反演对称性破缺导致.各向异性层间DMI的发现不仅揭示了磁性多层膜中长程层间耦合相互作用的起源,也为基于磁性多层膜的自旋电子学器件设计提供了新的途径.The Dzyaloshinskii-Moriya interaction(DMI)has stimulated immense interests in the condensed matter physics community and is thought to be operative in crystal structures without space inversion symmetry[1,2]or appear in the thin heterostructure lacking inversion symmetry[1,3].Different from the conventional symmetric Heisenberg exchange interaction which stabilizes the collinear spin alignments,interfacial DMI prefers the non-collinear spin structures such as chiral domain walls and magnetic skyrmions[4-6]that are promising candidates for spin-based information devices[5,7,8].

关 键 词：磁性多层膜 对称性破缺 磁化翻转 各向异性 自旋电子 层间耦合 第一性原理计算 面心立方结构 

分 类 号：O641.3[理学—物理化学]