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

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dc.contributor.author Maity, Tuhin
dc.contributor.author Kepaptsoglou, Demie
dc.contributor.author Schmidt, Michael
dc.contributor.author Ramasse, Quentin
dc.contributor.author Roy, Saibal
dc.date.accessioned 2017-10-19T08:50:01Z
dc.date.available 2017-10-19T08:50:01Z
dc.date.issued 2017-03-03
dc.identifier.citation Maity, 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.95.100401 en
dc.identifier.volume 95 en
dc.identifier.issued 10 en
dc.identifier.startpage 1 en
dc.identifier.endpage 5 en
dc.identifier.issn 2469-9950
dc.identifier.uri http://hdl.handle.net/10468/4911
dc.identifier.doi 10.1103/PhysRevB.95.100401
dc.description.abstract The 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.sponsorship Irish Research Council Project (No. GOIPD/2016/474) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society en
dc.relation.uri https://link.aps.org/doi/10.1103/PhysRevB.95.100401
dc.rights © 2017, American Physical Society. All rights reserved. en
dc.subject Hysteresis en
dc.subject Loop en
dc.subject Inverted en
dc.subject Magnetic en
dc.subject Exchange bias en
dc.title Observation of complete inversion of the hysteresis loop in a bimodal magnetic thin film en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Saibal Roy, Tyndall Microsystems, University College Cork, Cork, Ireland. +353-21-490-3000 Email: saibal.roy@tyndall.ie en
dc.internal.availability Full text available en
dc.date.updated 2017-10-13T12:24:00Z
dc.description.version Published Version en
dc.internal.rssid 414213898
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder Irish Research Council en
dc.contributor.funder Engineering and Physical Sciences Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Physical Review B en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress saibal.roy@tyndall.ie en
dc.relation.project info: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


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