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
487 2023-04-04 16:00  Room 2501, KAIST Natural Sciences Lecture Hall(E6)  Chiral Magnetism: A Geometric Perspective
486 2018-06-22 16:00  #1323, E6-2  Tuning functional properties of BiFeO3 films using strain and growth chemistry file
485 2018-06-22 16:00  #1323, E6-2  Tuning functional properties of BiFeO3 films using strain and growth chemistry file
484 2018-09-05 16:00  #1323, E6-2  Shining a light on fractional excitations file
483 2022-03-18 11:00  Online seminar  (응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids file
482 2021-03-02 16:00  Online  Sensitive terahertz detection with graphene-based transistors file
481 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
480 2016-11-04 15:00  E6-2. #1323(1st fl.)  Quantum information experiments using few electron spins in semiconductors
479 2022-01-17 14:00  E6-2 Room 2502  Five Lectures on Observational Probes of Dark Energy file
478 2018-11-09 16:00  E6-2. 1st fl. #1323  Quantum sensing and imaging with diamond defect centers for nano-scale spin physics file
477 2022-11-18 16:00  E6-2. 1st fl. #1323 & Zoom  Qubits, new experimental tools for physics file
476 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
475 2017-07-10 16:00  Jul. 10th (Mon), 4pm  “Intertwined Orders in a Heavy-fermion metal” file
474 2022-05-25 14:00  E6 Room(#2501)  Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file
473 2023-04-28 11:00  E6 #1323  Tkachenko wave: From the modern field theory viewpoint
472 2018-10-18 10:00  #1323, E6-2  Understanding membrane protein folding using single-molecule force techniques file
471 2023-07-19 16:00  E6-2, #1323  [High-Energy Theory Seminar]Deriving the Simplest Gauge-String Duality
470 2023-03-02 11:00  E6-2, #1322  Probing Anomalies of Non-Invertible Symmetries with Symmetry TFTs
469 2020-07-02 16:00  Zoom Video Conference Seminar  An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
468 2015-08-04 11:00  B501, Room Red, KI bldg. 5nd fl.  Propagation of ultrasound through two- and three-dimensional strongly scattering media