Unconventional dynamics of ferrimagnets
일 시 : 2021년 06월 01일 화요일 16:00
연 사 : 김 세 권 교수 (카이스트 물리학과)
장 소 : 온라인 진행 ( https://us02web.zoom.us/j/89235295426 , 줌회의 ID: 892 3529 5426 )
HOST : 천 상 모 교수님
초 록
Ferrimagnets have recently emerged as versatile platforms for spintronics owing to their unique tunability of material parameters. In particular, they offer the independent control of the spin density and the magnetization, which are impossible to achieve in more conventional magnets such as ferromagnets and antiferromagnets and thereby offer unprecedented opportunity to discover novel spin physics and realize highly tunable spintronic devices. In this talk, we will discuss the recent theoretical progress on the ensuing novel dynamics of ferrimagnets. The topics will include the dynamics of topological solitons such as domain walls [1,2], skyrmions [3,4], and vortices [5] within the framework of the generalized Landau-Lifshitz-Gilbert-like equations for ferrimagnets. Also, the novel properties of spin waves in ferrimagnets based on two distinct handedness will be discussed [6,7]. The talk will be concluded by providing a future outlook on ferrimagnetic spintronics and by discussing some fundamental questions that we are facing to understand the non-equilibrium properties of ferrimagnets [8].