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Lee, Ki-Suk
Creative Lab. for Advanced Spin Systems (CLASS)
Research Interests
  • Magnetism, spintronics, spin dynamics, rare-earth free magnet

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Oppositely rotating eigenmodes of spin-polarized current-driven vortex gyrotropic motions in elliptical nanodots

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dc.contributor.author Lee, Ki-Suk ko
dc.contributor.author Yu, Young-Sang ko
dc.contributor.author Choi, Youn-Seok ko
dc.contributor.author Jeong, Dae-Eun ko
dc.contributor.author Kim, Sang-Koog ko
dc.date.available 2014-10-27T08:37:52Z -
dc.date.created 2014-10-27 ko
dc.date.issued 2008-05 -
dc.identifier.citation APPLIED PHYSICS LETTERS, v.92, no.19, pp.1 - 3 ko
dc.identifier.issn 0003-6951 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/7801 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=44049087254 ko
dc.description.abstract The authors found that there exist two different rotational eigenmodes of oppositely rotating sense in spin-polarized current-driven vortex gyrotropic motions in soft magnetic elliptical nanodots. Simple mathematical expressions were analytically calculated by adopting vortex-core (VC)-rotation-sense- dependent dynamic susceptibility tensors based on the linearized Thiele equation [Phys. Rev. Lett. 30, 230 (1973)]. The numerical calculations of those analytical expressions were confirmed by micromagnetic simulations, revealing that linear-regime steady-state VC motions driven by any polarized oscillating currents can be interpreted simply by the superposition of the clockwise and counterclockwise rotational eigenmodes. The shape of the orbital trajectories of the two eigenmodes is determined only by the lateral dimension of elliptical dots. Additionally, the orbital radii and phases of the two eigenmodes' VC motions were found to markedly vary with the frequency of applied currents, particularly across the vortex eigenfrequency and according to the vortex polarization, which results in overall VC motions driven by any polarized oscillating currents. ko
dc.description.statementofresponsibility open -
dc.language ENG ko
dc.publisher AMER INST PHYSICS ko
dc.subject MAGNETIZATION DYNAMICS ko
dc.title Oppositely rotating eigenmodes of spin-polarized current-driven vortex gyrotropic motions in elliptical nanodots ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-44049087254 ko
dc.identifier.wosid 000256564200064 ko
dc.type.rims ART ko
dc.description.wostc 8 *
dc.description.scopustc 7 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-10-27 *
dc.identifier.doi 10.1063/1.2926666 ko
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