logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다. 아 래 1. 제 목: Wave properties of dipole-exchange spin waves in confined magnetic thin films 2. 연 사: 김 상 국 교수(서울대 신소재공학과) 3. 일 시: 2006년 10월 25일(수요일) 오후 430 4. 장 소: 물리학과세미나실(31355호실) 5. 초 록: Dipole-exchange spin waves in confined ferromagnetic thin-film structures have attracted much attention because of their fundamental interests as well as technological applications to magnetic logic and sensor devices [1]. Accordingly, studies on the eigenmodes of spin-wave excitations have been intensively performed both theoretically and experimentally for quasi-two- dimensional micrometer-size films with various shapes. However, those spin waves have not been studied in terms of its wave behaviors, such as radiation, propagation, transmission, reflection, and interference. In this talk, I will present micromagnetic simulation results on the characteristic wave properties of spin waves traveling in various model systems made of geometrically confined magnetic films [2]. It is found that strong spin waves can be radiated from the core of a single magnetic vortex by virtue of large torques localized at the core region, and that the radiated spin waves can be injected into and propagate well through variously shaped nanowire-type magnetic waveguides. Furthermore, their transmission through heterostructures, and its related filtering of spin waves with lower frequencies are investigated. Finally, spin-wave interference is demonstrated with a model system, which is analogous to Young’s double slit experiment with light. These results offer a preview of the forthcoming era of magnetic logic devices using spin waves traveling at ultrahigh speeds [3, 4].
번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1079714
15 <8/20> Radioprotection effect and anti-tumor immunity by TCM-EF in mice 2013.08.21 179418
14 <Feb.18(Thu.)> Hund's metallicity in the vicinity of a Van Hove singularity / Correlated topological phases in strongly correlated heterostructures 2021.02.16 180716
13 <4/18(금)> 양자물질초전도체창의연구소 초청 세미나 2014.04.15 180952
12 <12/20(Thu) 2:00pm> Gravitating Spinning Stars (a particle theorist's perspective) 2018.12.17 184294
11 <11/21> Cosmological viable scalar-tensor theories of gravity 2012.11.16 199289
10 <9/20> Time-reversal anomaly in Josephson effect involving Majorana fermions 2012.09.20 205470
9 <5/16(토)> 세미나 개최 안내 2015.05.18 217815
8 <11/5(화)> 특별세미나 개최 안내 2013.11.01 230503
7 <Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design 2021.01.11 237285
6 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 245358
5 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 245448
4 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 248434
3 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 253381
» <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 297446
1 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 408215