Magnetic performances and switching behavior of Co-rich CoPtP micro-magnets for applications in magnetic MEMS

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dc.contributor.author Mallick, Dhiman
dc.contributor.author Paul, Kankana
dc.contributor.author Maity, Tuhin
dc.contributor.author Roy, Saibal
dc.date.accessioned 2019-04-11T15:51:01Z
dc.date.available 2019-04-11T15:51:01Z
dc.date.issued 2019-01-08
dc.identifier.citation Mallick, D., Paul, K., Maity, T. and Roy, S. (2019) 'Magnetic performances and switching behavior of Co-rich CoPtP micro-magnets for applications in magnetic MEMS', Journal of Applied Physics, 125(2), 023902 (14 pp). doi: 10.1063/1.5063860 en
dc.identifier.volume 125 en
dc.identifier.issued 2 en
dc.identifier.startpage 1 en
dc.identifier.endpage 14 en
dc.identifier.issn 0021-8979
dc.identifier.uri http://hdl.handle.net/10468/7756
dc.identifier.doi 10.1063/1.5063860 en
dc.description.abstract In this paper, the magnetic properties of Co-rich CoPtP films electrodeposited using an optimized Pulse Reverse (PR) technique are investigated for magnetic MEMS applications. By using a combination of forward and reverse pulses with optimized duty cycles during deposition and suitable bath chemistry, the film stress is reduced significantly, which results in smooth, crack-free films of thickness up to 26 μm. The deposited film of thickness ∼3 μm shows a coercivity of 268 kA/m, a remanence of 0.4 T, and a maximum energy product of 35 kJ/m3 in the out-of-plane direction. The variation in the hard-magnetic properties of the films for changing the film thickness is analyzed in terms of the composition, crystalline structure, and grain size. As the thickness is increased from 0.9 μm to 26 μm, the in-plane coercivity reduces by 17% due to an increase of the grain size and the Co content in the alloy structure. The in-plane squareness factor increases by 1.5 times as the thickness is increased over the above-mentioned range, which results in an enhancement of the in-plane remanence value. The magnetization reversal behavior of the deposited films indicates that the nature of magnetic interaction is significantly influenced by the thickness of the films, where the dipolar interaction for the thinner films changes to exchange coupling at higher thickness due to the increase of the grain size. Finally, an innovative design strategy to integrate CoPtP in magnetic MEMS devices by micro-patterning is proposed and analyzed using the finite element method. The demagnetization fields of the magnetic elements are minimized through optimized micro-patterned structures which improve the viability of PR deposited CoPtP micro-magnets having suitable nano-grains in potential MEMS based applications. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.uri https://aip.scitation.org/doi/abs/10.1063/1.5063860
dc.rights © 2019 the authors. Published under license by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Journal of Applied Physics and may be found at https://doi.org/10.1063/1.5063860 en
dc.subject Cobalt alloys en
dc.subject Coercive force en
dc.subject Crystal structure en
dc.subject Demagnetisation en
dc.subject Electrodeposition en
dc.subject Exchange interactions (electron) en
dc.subject Finite element analysis en
dc.subject Grain size en
dc.subject Internal stresses en
dc.subject Magnetic switching en
dc.subject Magnetic thin films en
dc.subject Magnetisation reversal en
dc.subject Phosphorus alloys en
dc.subject Platin en
dc.subject Thin files en
dc.subject Magnetic devices en
dc.subject MEMS devices en
dc.subject Magnetic materials en
dc.subject Exchange couplings en
dc.subject Microarrays en
dc.title Magnetic performances and switching behavior of Co-rich CoPtP micro-magnets for applications in magnetic MEMS 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.check.info Access to this article is restricted until 12 months after publication by request of the publisher. en
dc.check.date 2020-01-08
dc.date.updated 2019-04-11T14:49:31Z
dc.description.version Published Version en
dc.internal.rssid 481149060
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder European Regional Development Fund en
dc.contributor.funder Horizon 2020 en
dc.contributor.funder Irish Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Applied Physics en
dc.internal.copyrightchecked No
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress saibal.roy@tyndall.ie en
dc.identifier.articleid 23902 en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Research Centres/13/RC/2077/IE/CONNECT: The Centre for Future Networks & Communications/ en
dc.relation.project info:eu-repo/grantAgreement/EC/H2020::RIA/730957/EU/European Infrastructure Powering the Internet of Things/EnABLES en
dc.identifier.eissn 1089-7550


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