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)
615 2009-02-23 16:00    Physics Colloquium : 2009 Spring file
614 2009-09-07 16:00    Physics Colloquium : 2009 Fall file
613 2009-10-21 16:00    Interdimensional Universality of Dynamic Interfaces
612 2010-02-08 16:00    Physics Ciolloquium : 2010 Spring file
611 2010-02-14 16:00    Physics Colloquium - 2011 Spring file
610 2010-09-06 16:00    Physics Colloquium : 2010 Fall file
609 2011-05-16 16:00    Photonics with surface plasmon polaritons
608 2011-09-03 16:00    Physics Colloquium : 2011 Fall file
607 2012-02-13 16:00    Physics Colloquium : 2012 Spring
606 2012-04-02 16:00    A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
605 2013-03-11 16:00    Physics Colloquium : 2013 Spring
604 2013-09-09 16:00    Physics Colloquium : 2013 Fall
603 2014-03-10 16:00    Physics Colloquium : 2014 Spring file
602 2014-05-28 17:00    부품소재산업이 미래다
601 2014-12-22 14:00    Dynamics of molecular motors: Power stroke vs Brownian ratchet file
600 2015-03-04 12:00    Bioimaging and Biosensing Using Near-Infrared Fluorescence file
599 2015-03-09 16:00    Physics Colloquium : 2015 Spring file
598 2015-03-13 14:00    The 15th Innovative Workshop on Soft/Bio Materials file
597 2015-06-03 12:00    The First Wednesday Multidisciplinary Forum file
596 2015-07-15 14:00    Electronic and optical properties of titanate-based oxide superlattices