报告题目：Interfacial Dzyaloshinskii–Moriya interaction in magnetic multilayer thin films

报 告 人：Xin Ma，UT Austin

报告时间：2017-04-28 10:30

报告地点：物理系理科楼C302

报告摘要：The Dzyaloshinskii-Moriya interaction (DMI) refers to an antisymmetric exchange interaction that promotes non-collinear spin alignments. DMI plays important roles in a host of interesting phenomena, such as magnon Hall effect, multiferroicity, and magnetic skyrmion dynamics. In this presentation, I will report quantitative measurements of interfacial DMI with Brillouin light scattering technique in many different magnetic multilayer thin films. Effective tuning of DMI has also been achieved by interfacial engineering utilizing two DMI-active interfaces. Moreover, we discovered strong DMI across ferromagnet / antiferromagnet interfaces. DMI in such material system exhibits important difference as well as some similarities with that in heavy metal /FM bilayers. Our results provide new insights for designing magnetic thin film heterostructures with tailored DMI for controlling topological spin textures.