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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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Low-Power Selective Control of Ultrafast Vortex-Core Switching by Circularly Rotating Magnetic Fields: Circular-Rotational Eigenmodes

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dc.contributor.author Kim, Sang-Koog ko
dc.contributor.author Lee, Ki-Suk ko
dc.contributor.author Choi, Youn-Seok ko
dc.contributor.author Yu, Young-Sang ko
dc.date.available 2014-10-29T00:20:35Z -
dc.date.created 2014-10-27 ko
dc.date.issued 2008-11 -
dc.identifier.citation IEEE TRANSACTIONS ON MAGNETICS, v.44, no.11, pp.3071 - 3074 ko
dc.identifier.issn 0018-9464 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/7885 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=58249097093 ko
dc.description.abstract We found novel dynamic properties of vortex gyrotropic motions in soft magnetic nanodots driven by oscillating in-plane magnetic fields. The elementary eigenmodes of the field-driven gyrotropic motions are found to be the two counterclockwise (CCW) and clockwise (CW) circularly rotating motions of a vortex core (VC) with respect to the corresponding CCW and CW circularly rotating fields (H-CCW and H-CW) of a certain angular frequency omega(H). Owing to asymmetric resonance characteristics between the two orthogonal eigenmodes at omega(H) close to the vortex eigenfrequency omega(D), the use of H-CCW (H-CW) with omega(H) similar to omega(D) allows us to selectively and reliably switch, with sufficiently low field strengths as small as similar to 10 Oe, only the upward (downward) oriented VC to its downward (upward) one. The results promise a reliable, low-power, and effective means of information storage, recording, and readout, representing an advanced step toward realizing a new class of vortex-based random access memory (VRAM) devices. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC ko
dc.subject Circular eigenmodes ko
dc.subject Circularly rotating fields ko
dc.subject Gyrotropic motion ko
dc.subject Magnetic vortex (mv) ko
dc.subject Vortex core (vc) switching ko
dc.subject Vortex-based random access memory (VRAM) ko
dc.title Low-Power Selective Control of Ultrafast Vortex-Core Switching by Circularly Rotating Magnetic Fields: Circular-Rotational Eigenmodes ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-58249097093 ko
dc.identifier.wosid 000262221200160 ko
dc.type.rims ART ko
dc.description.wostc 9 *
dc.description.scopustc 9 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-10-27 *
dc.identifier.doi 10.1109/TMAG.2008.2001539 ko
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