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 2022학년도 1학기 콜로퀴움 일정 2022.01.10 29269
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 980701
120 <4/18> 삼중항 여기자를 이용한 유기광전소자 연구 2012.04.05 89759
119 <4/28> Generalised cosmological scaling solutions in braneworld and their duality properties 2006.04.24 89780
118 <10/10> Spin transistor : Detection and manipulation of spin transport in semiconductor 2012.09.27 89836
117 <Nov. 8(Wed.) 4:30 PM> 연성물질 기반 위상학적 결함구조의 상전이와 응 2017.11.01 90203
116 <4/13> Introduction to Quantum Information Processing 2007.04.11 90649
115 <11/19> From Schrödinger's cat to quantum technology using light 2010.11.11 90907
114 <4/22> How Many is Different? Ideal Bose gas revisited 2011.04.22 91068
113 <3/12(화)>물리학과 특별초청강연 개최 안내 2013.03.04 91338
112 <11/21> Cosmological viable scalar-tensor theories of gravity 2012.11.16 91407
111 <10/15> An Ideal Mean-Field Transition in a Driven Interacting System 2009.09.30 91561
110 <1/24> Basics of Gravitational Perturbatiosn 2011.01.19 92178
109 <9/1> 원자핵 자기공명(Nuclear Magnetic Resonance) 해설 - 원자선에서 영상까지 2010.08.30 92487
108 <5/11>Emergent Geometry as Quantum Gravity 2009.05.07 92533
107 <12/21(금)> Theory of topological quantum phase transitions in 3D noncentrosymmetric systems 2012.12.05 92660
106 <10/15> Electric control of magnetic nanostructures via spin torque 2010.10.08 92805
105 <11/22>A Glimpse of X-ray Sky 2006.11.16 92854
104 <Nov.13(Fri) 16:00> Kondo screening in mixed valence and heavy fermion compounds and the signatures of Nozieres’ exhaustion 2015.11.04 92880
103 2016학년도 2학기 콜로퀴움 일정 2016.08.02 92901
102 <8/17> AdS Black Hole Solutions in Extended New Massive Gravity 2010.08.16 93262
101 <9/20> Time-reversal anomaly in Josephson effect involving Majorana fermions 2012.09.20 93346