Asymmetric shift of exchange bias loop in Ni-Ni(OH)2 core-shell nanoparticles

Simple item page
dc.contributor.authorMaity, Tuhin
dc.contributor.authorRoy, Saibal
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderIrish Research Councilen
dc.date.accessioned2018-06-05T09:50:58Z
dc.date.available2018-06-05T09:50:58Z
dc.date.issued2018-05-24
dc.date.updated2018-05-30T11:59:33Z
dc.description.abstractWe report the observation of the asymmetric shift of exchange bias loop in Ni-Ni(OH)2 core-shell nanoparticles where the average size of the ferromagnetic (FM) Ni nanoparticles is ∼30 nm and the thickness of antiferromagnetic (AFM) Ni(OH)2 shell is ∼5nm. The exchange bias (EB) found below Néel temperature (TN∼22 K) of Ni(OH)2 is path dependent, while the coercivity (HC) increases and decreases for positive and negative bias field respectively. In the present case, we found that the inversion symmetry of hysteresis loop is broken and the shift in EB loop is only observed in descending part of the hysteresis loop, which is conspicuous. We demonstrate that the asymmetric shift of EBs in these core-shell nanoparticles is due to the presence of frustrated super spin glass (SSG) at the interface which influences the reversal mechanism of the hysteresis loop. It is argued that the net interface moment from the SSG at the interface of core-shell nanoparticles sets a unidirectional anisotropy after field cooling, which is thought to be the origin of this path dependency of the EB and observed via descending part of the hysteresis loop, ushering potential for novel spin based applications.en
dc.description.sponsorshipIrish Research Council (Project No. GOIPD/2016/474)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMaity, T. and Roy, S. (2018) 'Asymmetric shift of exchange bias loop in Ni-Ni(OH)2 core-shell nanoparticles', Journal of Magnetism and Magnetic Materials. doi:10.1016/j.jmmm.2018.05.064en
dc.identifier.doi10.1016/j.jmmm.2018.05.064
dc.identifier.issn0304-8853
dc.identifier.journaltitleJournal of Magnetism and Magnetic Materialsen
dc.identifier.urihttps://hdl.handle.net/10468/6245
dc.language.isoenen
dc.publisherElsevier B.V.en
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.rights© 2018, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAsymmetric shiften
dc.subjectExchange biasen
dc.subjectCore-shell nanoparticlesen
dc.subjectSuper spin glassen
dc.subjectReversal mechanismen
dc.subjectHysteresis loopen
dc.titleAsymmetric shift of exchange bias loop in Ni-Ni(OH)2 core-shell nanoparticlesen
dc.typeArticle (peer-reviewed)en
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Roy1-s2.0-S0304885317335825-main.pdf
Size:
1.47 MB
Format:
Adobe Portable Document Format
Description:
Accepted Version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Tyndall National Institute - Journal Articles
Physics - Journal Articles