visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-12-11 14:30 
일시 Dec. 11 (Fri.), 02:30 PM 
장소 online 
연사 Myung Hwa Jung(Sogang Univ.) 

 

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 장소 제목
250 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
249 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
248 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
247 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
246 2020-11-17 12:00  Online(Zoom)  Quantum- & Nano-Photonics" 세미나 시리즈 file
245 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
244 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
243 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
242 2020-12-02 10:00  Zoom  Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
241 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
240 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
» 2020-12-11 14:30  online  Antisymmetric interlayer exchange coupling in magnetic multilayers
238 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
237 2020-12-23 10:00  Online  Online workshop for Quantitative Phase Imaging file
236 2021-01-28 15:00  Zoom  Topological Transport of Deconfined Hedgehogs in Magnets file
235 2021-01-28 18:00  Online Seminar  Quantum metamaterials: concept, theory, prototypes and possible applications file
234 2021-02-02 14:30  Zoom  Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
233 2021-02-15 17:00  Zoom  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
232 2021-02-17 09:00  Online  석학 대중 강연 및 강의 시리즈 file
231 2021-03-02 16:00  Online  Sensitive terahertz detection with graphene-based transistors file