visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-12-11 14:30 
연사  
장소 online 

 

SRC Seminar

 

 

 

 

 

Antisymmetric interlayer exchange coupling in magnetic multilayers

 

 

 

Dr. Myung Hwa Jung

 

Department of Physics, Sogang University

 

 

 

Dec. 11 (Fri.), 02:30 PM

 

Online seminar

 

https://kaist.zoom.us/j/89400733670
회의 ID: 894 0073 3670
암호: 703454

 

 

 

 

 

 

 

Abstract:

 

The exchange interaction governs static and dynamic magnetism. This fundamental interaction comes in two flavors - symmetric and antisymmetric. While the symmetric interaction leads to ferro- and antiferromagnetism, the antisymmetric interaction has attracted significant interest owing to its major role in promoting topologically non-trivial spin textures that promise fast, energy-efficient devices. So far, the antisymmetric exchange interaction has been found to be rather short–ranged and limited to a single magnetic layer. Here, we report a long-range antisymmetric interlayer exchange interaction in perpendicularly magnetized synthetic antiferromagnets with parallel and antiparallel magnetization alignments. Asymmetric hysteresis loops under an in-plane field reveal a unidirectional and chiral nature of this interaction, resulting in canted magnetic structures. We explain our results by considering spin-orbit coupling combined with reduced symmetry in multilayers. Our discovery of a long-range chiral interaction provides an additional handle for engineering magnetic structures and could enable three-dimensional topological structures.

 

 

 

 

 

Contact: SunYoung Choi, (sunyoungchoi@kaist.ac.kr)

 

Center for Quantum Coherence in Condensed Matter, KAIST

 

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
385 2023-09-18 16:00    [CAPP Seminar] Searching for axions in quantum vacuum birefringence file
384 2022-11-24 16:00    Probing fundamental physics by mapping the mm and sub-mm sky
383 2016-10-07 13:30    “Symmetry and topology in transition metal dichalcogenide?”
382 2022-10-26 10:00    Replica Higher-Order Topology of Hofstadter Butterflies in Twisted Bilayer Graphene
381 2016-11-29 16:00    Symmetry Protected Kondo Metals and Their Phase Transitions
380 2017-11-03 16:00    Expedition to the Kitaev Quantum Spin Liquid: Hunting for Majorana fermions file
379 2022-07-14 15:00    Pure two-dimensional quantum electron liquid and its phase transition
378 2022-09-30 14:30    Putting a spin on the Josephson effect file
377 2018-04-13 10:00    Quantum meets Mechanics: from Quantum Information to Fundamental Research file
376 2019-05-01 16:00    Raman and x-ray scattering study on correlated electron systems: two case examples file
375 2022-05-25 16:00    Uncovering New Lampposts for Dark Matter: Continuum or Conformal
374 2022-05-11 16:00    Gravity as a phenomenon in quantum dynamics
373 2015-11-28 10:00    Electron Tunneling Spectroscopy of Single and Bilayer Graphene with Hexagonal Boron Nitride as Tunneling Barrier
372 2021-05-14 14:30    Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
371 2021-04-02 14:30    Quantum computing and entanglement generation using trapped ions and photons
370 2016-03-11 16:00    Jan. Switching handedness of of chiral solitons in Z4 topological insulators
369 2023-09-26 16:00    [High Energy Theory Seminar]A new step in interacting dark sector cosmologies
368 2019-03-29 16:00    Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
367 2025-05-28 16:00  Dr. Thiago L. M. Guedes (Forschungszentrum Jülich)  Computing the graph-changing dynamics of loop quantum gravity file
366 2018-06-18 10:00    Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file