Antisymmetric interlayer exchange coupling in magnetic multilayers
2020.12.08 14:57
장소 | online |
---|---|
일시 | Dec. 11 (Fri.), 02:30 PM |
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
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
공지 | 2019/09/18 - 12/5 | Seminar Room #1323 | Prof. David Schuster and etc. | Fall 2019: Physics Seminar Serises |
공지 | 2019/09/02 - 12/09 | Seminar Room 1501 | 이호성 박사 (한국표준과학연구원) and etc. | Fall 2019: Physics Colloquium |
286 | October 18 (Thu.), 10:00 AM | #1323, E6-2 | Dr. Duyoung Min |
Understanding membrane protein folding using single-molecule force techniques
![]() |
285 | July 2, 2020 (Thursday) | Zoom Video Conference Seminar | Dr. Emmanuel Flurin (CEA Saclay) |
An irreversible qubit-photon coupling for the detection of itinerant microwave photons
![]() |
284 | 2015/08/04, 11PM | B501, Room Red, KI bldg. 5nd fl. | Dr. Eric Jin Ser Lee(Univ. of Manitoba, Canada) | Propagation of ultrasound through two- and three-dimensional strongly scattering media |
283 | Jul. 07 (Thu.) 2PM | #1323(E6-2. 1st fl.) | Dr. Eun Ah Kim, CORNELL UNIV. | Let there be topological superconductors |
282 | Sep. 22 (Fri.), 01:00 PM | E6-2. 1st fl. #1323 | Dr. EunSeong Kim / Department of Physics, KAIST |
Superconductor-metal-insulator transition in thin Tantalum films
![]() |
281 | Jun. 2 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Euyheon Hwang(황의헌) |
Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal)
![]() |
280 | May 24 (Tue) 4 PM | E6-2. #1323(1st fl.) | Dr. Euyheon Hwang, SKKU Advanced Institute of Nanotechnology, Sung Kyung Kwan University | Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density |
279 | April 4, 2016 (Mon) - April 8, 2016 (Fri) | KAIST Natural Science Building (E6-2), RM #4314 | Dr. Fritz Caspers (CERN) | Radio frequency engineering |
278 | Nov. 1st (Tue), 10:30AM | #1323(E6-2 1st fl.) | Dr. Gadi Eisenstein, Technion | Time scale dependent dynamics in InAs/InP quantum dot gain media |
277 | October 25 (Thu.), 4:00 PM | #1323, E6-2 | Dr. Gang Li |
Abelian and non-Abelian dark photons
![]() |
276 | Sep. 22 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. GilHo Lee / Department of Physics, POSTECH |
Unexpected Electron-Pairing in Integer Quantum Hall Effect
![]() |
275 | Sep. 22 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. GilHo Lee / Department of Physics, POSTECH |
Quantum Electronic Transport in Graphene Hybrid Nanostructures
![]() |
274 | Dec. 7 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Gyung Min Choi |
Spin generation from heat and light in metals
![]() |
273 | 2015/09/14, 2PM | E6-2. 2nd fl. #2501 | Dr. Hae Ja Lee ( Stanford University, SLAC ) | Ultrafast X-ray Studies on Dynamics Matter in Extreme Conditions |
272 | Sep. 22, 2016(Thu), 3:30 PM | #1323(E6-2, 1st fl.) | Dr. Haiyang Yan (Institute of Nuclear Physics and Chemistry) | Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model |
271 | Sep. 22, 2016(Thu), 3:30 PM | #1323(E6-2, 1st fl.) | Dr. Haiyang Yan (Institute of Nuclear Physics and Chemistry) | Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model |
270 | May 19 (Thu) 4PM | #1323(E6-2, 1st fl.) | Dr. Heedeuk Shin, POSTECH | Nonlinear/quantum optical effect in silicon nano-photonics |
269 | Apr. 2 (Fri.), 04:00 PM | Online(Zoom) | Dr. Heejun Yang (KAIST) | Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy |
268 | 2015/10/23, 3PM | E6-2, #5318 | Dr. Helmut Soltner (Forschungszentrum Juelich) | Development of a Rogowski Coil as a new beam position monitor |
267 | Jun 24 (Mon) 11:00 | E6-2, #1323 | Dr. Henning Schomerus |
Topological photonic anomalies
![]() |