Observation of complete inversion of the hysteresis loop in a bimodal magnetic thin film

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dc.contributor.authorMaity, Tuhin
dc.contributor.authorKepaptsoglou, Demie
dc.contributor.authorSchmidt, Michael
dc.contributor.authorRamasse, Quentin
dc.contributor.authorRoy, Saibal
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderIrish Research Councilen
dc.contributor.funderEngineering and Physical Sciences Research Councilen
dc.date.accessioned2017-10-19T08:50:01Z
dc.date.available2017-10-19T08:50:01Z
dc.date.issued2017-03-03
dc.date.updated2017-10-13T12:24:00Z
dc.description.abstractThe existence of inverted hysteresis loops (IHLs) in magnetic materials is still in debate due to the lack of direct evidence and convincing theoretical explanations. Here we report the direct observation and physical interpretation of complete IHL in Ni45Fe55 films with 1 to 2 nm thin Ni3Fe secondary phases at the grain boundaries. The origin of the inverted loop, however, is shown to be due to the exchange bias coupling between Ni45Fe55 and Ni3Fe, which can be broken by the application of a high magnetic field. A large positive exchange bias (HEB=14×HC) is observed in the NiFe composite material giving novel insight into the formation of a noninverted hysteresis loop (non-IHL) and IHL, which depend on the loop tracing field range (HR). The crossover from non-IHL to IHL is found to be at 688 Oe.en
dc.description.sponsorshipIrish Research Council Project (No. GOIPD/2016/474)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMaity, T., Kepaptsoglou, D., Schmidt, M., Ramasse, Q., Roy, S. (2017) 'Observation of complete inversion of the hysteresis loop in a bimodal magnetic thin film', Physical Review B, 95(10), 100401 (5pp). doi:10.1103/PhysRevB.95.100401en
dc.identifier.doi10.1103/PhysRevB.95.100401
dc.identifier.endpage5en
dc.identifier.issn2469-9950
dc.identifier.issued10en
dc.identifier.journaltitlePhysical Review Ben
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/4911
dc.identifier.volume95en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Principal Investigator Programme (PI)/11/PI/1201/IE/Vibration based wideband electromagnetic micropower generators on silicon: MEMS to NEMS/en
dc.relation.urihttps://link.aps.org/doi/10.1103/PhysRevB.95.100401
dc.rights© 2017, American Physical Society. All rights reserved.en
dc.subjectHysteresisen
dc.subjectLoopen
dc.subjectInverteden
dc.subjectMagneticen
dc.subjectExchange biasen
dc.titleObservation of complete inversion of the hysteresis loop in a bimodal magnetic thin filmen
dc.typeArticle (peer-reviewed)en
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