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 |
---|---|---|---|---|
182 | Feb. 12 (Mon), 3:00pm | #C303, (Creation Hall 3F, KAIST Munji Campus) | Dr. Byeongsu Yang, Kamioka Observatory, Univ. of Tokyo | The recent result of XMASS Experiment |
181 | Feb. 1 (Wed.), 2p.m. | #1323(E6-2. 1st fl.) | Dr. Michihisa Yamamoto, Department of Applied Physics, The University of Tokyo | Quantum electron optics using flying electrons |
180 | December 5 (Thu.), 16:00 PM | #1323, E6-2 | Prof. Soon-Hong Kwon |
Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell
![]() |
179 | December 3 (Tue.), 4:00 PM | #1323, E6-2 | Dr. Jong Mok Ok |
Toward Quantum Materials with Correlated Oxides
![]() |
178 | December 27(Fri.), 15:00 | E6-2,#5318 | Han Gyeol Suh |
The superconducting order parameter puzzle of Sr2RuO4
![]() |
177 | December 2(Wed), 10:00AM | Zoom | Prof. Rakshya Katiwada (Illinois Institute of Technology) |
Recent progress in Axion Dark Matter eXperiment (ADMX) technology
![]() |
176 | December 18 (Tue.), 4:00 PM | #1323, E6-2 | Prof. Shin-ichi Uchida |
Road to Higher Tc Superconductivity
![]() |
175 | December 13 (Fri.), 1:30-4:30 PM | #1323, E6-2 |
Biophysics Mini-symposium at KAIST
![]() | |
174 | December 13 (Fri.), 1:00 PM | #2501, E6-2 | Dr. Chang-Jong Kang |
Computational Material Designs: Current Status and Future Directions
![]() |
173 | Dec.9(Wed), 10:00AM | Zoom | Prof. Andrew Geraci (Northwestern University) |
Searching for the QCD axion with the ARIADNE experiment
![]() |
172 | Dec.23(Wed), 10:00~16:00 | Online | Prof. YongKeun Park (KAIST) and etc. |
Online workshop for Quantitative Phase Imaging
![]() |
171 | Dec.10(Thu), 01:55 PM | Zoom | Yin Wen (University of Tokyo) | Consistency of Boltzmann equation and light dark matter from inflaton decay |
170 | Dec. 9(Fri), 4p.m. | #1323(E6-2. 1st fl. | Dr. Kun Woo Kim, KIAS | Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator |
169 | Dec. 9(Fri), 1:30 p.m. | #1323(E6-2. 1st fl.) | Dr. Jae Yoon Cho, POSTECH | Entanglement area law in strongly-correlated systems |
168 | Dec. 8(Thu) 4p.m. | #1323(E6-2. 1st fl.) | Dr. Jinhyoung Lee, Hanyang University | Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator |
167 | Dec. 7 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Joon Ho Jang |
Novel probes of interacting electrons in 2D systems
![]() |
166 | Dec. 7 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Gyung Min Choi |
Spin generation from heat and light in metals
![]() |
165 | Dec. 3 (Fri.), 04:00 PM | Zoom webinar | Dr. Hyejin Jang (Seoul National University) |
Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer
![]() |
164 | Dec. 3 (Fri.), 02:30 PM | Zoom webinar | Dr. Soong-Geun Je(Chonnam National University) |
Topological Spin Textures: Skyrmions and Beyond
![]() |
163 | DEC. 27 (Thu), 04:00 PM | E6-2. 1st fl. #1323 | Prof. Na Young Kim |
Quantum Innovation (QuIN) Laboratory
![]() |