Asymmetric magnetic disorder observed in thermally activated magnetization reversal of exchange-biased IrMn/CoFe films

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dc.contributor.authorLee, Hun-Sungko
dc.contributor.authorRyu, Kwang-Suko
dc.contributor.authorYou, Chun-Yeolko
dc.contributor.authorJeon, Kun-Rokko
dc.contributor.authorYang, See-Hunko
dc.contributor.authorParkin, Stuart S. P.ko
dc.contributor.authorShin, Sung-Chulko
dc.date.accessioned2013-03-12T21:28:00Z-
dc.date.available2013-03-12T21:28:00Z-
dc.date.created2012-11-13-
dc.date.created2012-11-13-
dc.date.created2012-11-13-
dc.date.issued2013-01-
dc.identifier.citationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.325, pp.13 - 16-
dc.identifier.issn0304-8853-
dc.identifier.urihttp://hdl.handle.net/10203/103572-
dc.description.abstractWe report an asymmetry of magnetic disorder in exchange-biased IrMn(t(IrMn) = 5-20 nm)/CoFe(50 nm) films observed by means of a Kerr microscope, capable of direct domain observation. From the correlation between the magnetization half-reversal time and applied magnetic field, we find that the magnetization switching in all the films occurs via a thermally activated reversal mechanism for both branches of hysteresis loops. Surprisingly, in the forward branch reversal where the applied magnetic field is antiparallel to the direction of exchange-bias field, degree of magnetic disorder decreases as exchange-bias field increases, which is definitely contrasted with the case of backward branch reversal. This result is likely ascribed to the fact that the local values of exchange-bias field and coercive field are oppositely fluctuating with each other in the film. (C) 2012 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.titleAsymmetric magnetic disorder observed in thermally activated magnetization reversal of exchange-biased IrMn/CoFe films-
dc.typeArticle-
dc.identifier.wosid000310504300003-
dc.identifier.scopusid2-s2.0-84867301351-
dc.type.rimsART-
dc.citation.volume325-
dc.citation.beginningpage13-
dc.citation.endingpage16-
dc.citation.publicationnameJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS-
dc.identifier.doi10.1016/j.jmmm.2012.07.038-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorShin, Sung-Chul-
dc.contributor.nonIdAuthorYou, Chun-Yeol-
dc.contributor.nonIdAuthorYang, See-Hun-
dc.contributor.nonIdAuthorParkin, Stuart S. P.-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorExchange-bias-
dc.subject.keywordAuthorMagnetic disorder-
dc.subject.keywordAuthorAsymmetry-
dc.subject.keywordAuthorThermally activated reversal behavior-
dc.subject.keywordAuthorDomain wall motion-
dc.subject.keywordPlusULTRATHIN FERROMAGNETIC-FILMS-
dc.subject.keywordPlusDOMAIN-WALL MOTION-
dc.subject.keywordPlusNIO-CO BILAYERS-
dc.subject.keywordPlusPERPENDICULAR ANISOTROPY-
dc.subject.keywordPlusUNIVERSALITY-
dc.subject.keywordPlusCREEP-
dc.subject.keywordPlusNOISE-
dc.subject.keywordPlusLAYER-
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