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Nonuniform apparent relaxation from dephasing of magnetostatic wave modes in a confined microdisk

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dc.contributor.authorLee, Kyeong-Dongko
dc.contributor.authorKim, Ji-Wanko
dc.contributor.authorJeong, Jae-Wooko
dc.contributor.authorShin, Sung-Chulko
dc.date.accessioned2011-01-24T02:32:26Z-
dc.date.available2011-01-24T02:32:26Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2009-12-
dc.identifier.citationJOURNAL OF APPLIED PHYSICS, v.106, no.11, pp.113904-
dc.identifier.issn0021-8979-
dc.identifier.urihttp://hdl.handle.net/10203/21763-
dc.description.abstractWe report the nonuniform apparent relaxation due to the spatially inhomogeneous dephasing of magnetostatic wave modes in a confined Permalloy microdisk investigated by picosecond time-resolved scanning Kerr microscopy. Spin precession in the disk shows a considerable nonuniformity in the relaxation time along the direction of a bias magnetic field. The nonuniform apparent relaxation is well reproduced by micromagnetic simulation using uniform values of damping constant. This implies that the spinwaves in the microdisk plays a significant role in the relaxation process. The simulation study, based on the analysis of spinwave modes, reveals that the spatial relaxation variation is mainly caused by the spatially inhomogeneous dephasing between the fundamental mode and magnetostatic backward volume wave mode.-
dc.description.sponsorshipThe authors thank M. H. Son, D. Ahn, K. H. Hong, and C. H. Nam for their help in the instrumentation. This work was supported by National Research Laboratory Program, the Global Partnership Program, and World Class University Program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology. The authors acknowledge D.-H. Kim, S.-B. Choe, Th. Rasing, and K. Y. Guslienko for helpful discussion.en
dc.languageEnglish-
dc.language.isoen_USen
dc.publisherAMER INST PHYSICS-
dc.subjectSPIN DYNAMICS-
dc.subjectFERROMAGNET-
dc.subjectEXCITATION-
dc.subjectSPECTRUM-
dc.subjectFILMS-
dc.subjectFIELD-
dc.titleNonuniform apparent relaxation from dephasing of magnetostatic wave modes in a confined microdisk-
dc.typeArticle-
dc.identifier.wosid000272838600076-
dc.identifier.scopusid2-s2.0-72449174312-
dc.type.rimsART-
dc.citation.volume106-
dc.citation.issue11-
dc.citation.beginningpage113904-
dc.citation.publicationnameJOURNAL OF APPLIED PHYSICS-
dc.identifier.doi10.1063/1.3262613-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorShin, Sung-Chul-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorferromagnetic materials-
dc.subject.keywordAuthorhigh-speed optical techniques-
dc.subject.keywordAuthorKerr magneto-optical effect-
dc.subject.keywordAuthormagnetic relaxation-
dc.subject.keywordAuthormagnetostatic waves-
dc.subject.keywordAuthormicromagnetics-
dc.subject.keywordAuthorPermalloy-
dc.subject.keywordAuthorspin waves-
dc.subject.keywordPlusSPIN DYNAMICS-
dc.subject.keywordPlusFERROMAGNET-
dc.subject.keywordPlusEXCITATION-
dc.subject.keywordPlusSPECTRUM-
dc.subject.keywordPlusFILMS-
dc.subject.keywordPlusFIELD-
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