The dynamics of a domain wall in ferrimagnets driven by spin-transfer torque

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dc.contributor.authorKim, Dong-Hyunko
dc.contributor.authorKim, Duck-Hoko
dc.contributor.authorKim, Kab-Jinko
dc.contributor.authorMoon, Kyoung-Woongko
dc.contributor.authorYang, Seungmoko
dc.contributor.authorLee, Kyung-Jinko
dc.contributor.authorKim, Se Kwonko
dc.date.accessioned2020-10-14T08:55:06Z-
dc.date.available2020-10-14T08:55:06Z-
dc.date.created2020-08-18-
dc.date.created2020-08-18-
dc.date.created2020-08-18-
dc.date.created2020-08-18-
dc.date.issued2020-11-
dc.identifier.citationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.514, pp.167237-
dc.identifier.issn0304-8853-
dc.identifier.urihttp://hdl.handle.net/10203/276570-
dc.description.abstractThe spin-transfer-torque-driven (STT-driven) dynamics of a domain wall in an easy-axis rare-earth transition-metal ferrimagnet is investigated theoretically and numerically in the vicinity of the angular momentum compensation point T-A, where the net spin density vanishes. The particular focus is given on the unusual interaction of the antiferromagnetic dynamics of a ferrimagnetic domain wall and the adiabatic component of STT, which is absent in antiferromagnets but exists in the ferrimagnets due to the dominant coupling of conduction electrons to transition-metal spins. Specifically, we first show that the STT-induced domain-wall velocity changes its sign across T-A due to the sign change of the net spin density, giving rise to a phenomenon unique to ferrimagnets that can be used to characterize T-A electrically. It is also shown that the frequency of the STT-induced domain-wall precession exhibits its maximum at T-A and it can approach the spin-wave gap at sufficiently high currents. Lastly, we report a numerical observation that, as the current density increases, the domain-wall velocity starts to deviate from the linear-response result, calling for a more comprehensive theory for the domain-wall dynamics in ferrimagnets driven by a strong current.-
dc.languageEnglish-
dc.publisherELSEVIER-
dc.titleThe dynamics of a domain wall in ferrimagnets driven by spin-transfer torque-
dc.typeArticle-
dc.identifier.wosid000571177700015-
dc.identifier.scopusid2-s2.0-85088842721-
dc.type.rimsART-
dc.citation.volume514-
dc.citation.beginningpage167237-
dc.citation.publicationnameJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS-
dc.identifier.doi10.1016/j.jmmm.2020.167237-
dc.contributor.localauthorKim, Kab-Jin-
dc.contributor.localauthorLee, Kyung-Jin-
dc.contributor.localauthorKim, Se Kwon-
dc.contributor.nonIdAuthorKim, Dong-Hyun-
dc.contributor.nonIdAuthorKim, Duck-Ho-
dc.contributor.nonIdAuthorMoon, Kyoung-Woong-
dc.contributor.nonIdAuthorYang, Seungmo-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorSpintronics-
dc.subject.keywordAuthorNanomagnetism-
dc.subject.keywordAuthorFerrimagnet-
dc.subject.keywordAuthorDomain wall-
dc.subject.keywordAuthorSpin-transfer torque-
dc.subject.keywordAuthorCompensation point-
dc.subject.keywordPlusMOTION-
dc.subject.keywordPlusANTIFERROMAGNETS-
dc.subject.keywordPlusMOMENTUM-
dc.subject.keywordPlusSOLITONS-
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PH-Journal Papers(저널논문)
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