Precessional dynamics of Ni45Fe55 thin films for ultrahigh frequency integrated magnetics

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dc.contributor.author Godsell, Jeffrey F.
dc.contributor.author Kulkarni, Santosh
dc.contributor.author O'Donnell, Terence
dc.contributor.author Roy, Saibal
dc.date.accessioned 2017-09-20T10:06:35Z
dc.date.available 2017-09-20T10:06:35Z
dc.date.issued 2010
dc.identifier.citation Godsell, J. F., Kulkarni, S., O’Donnell, T. and Roy, S. (2010) 'Precessional dynamics of Ni45Fe55 thin films for ultrahigh frequency integrated magnetics', Journal of Applied Physics, 107(3), 033907 (8pp). doi: 10.1063/1.3276165 en
dc.identifier.volume 107
dc.identifier.issued 3
dc.identifier.startpage 1
dc.identifier.endpage 8
dc.identifier.issn 0021-8979
dc.identifier.uri http://hdl.handle.net/10468/4747
dc.identifier.doi 10.1063/1.3276165
dc.description.abstract Future monolithic point of load switched mode power supplies will be expected to meet the energy requirements of miniaturized, high functionality electronic devices. Recently, Ni45Fe55 has emerged as a potentially important material choice for use as a soft magnetic core material within high frequency integrated passive magnetic components. The operating frequency range of the integrated passives which form a key part of the point of load power supply must increase to allow for inductor/transformer miniaturization to become monolithic with power integrated circuits. In this work, an analysis of the high frequency permeability spectra of an electroplated Ni45Fe55 thin film has been carried out to quantitatively analyze the material's high frequency performance. Complex permeability spectra of the film have been investigated at frequencies up to 9 GHz to identify both the film's spectroscopic splitting factor (g) and its effective dimensionless damping parameter (alpha). The Kittel equation is utilized to identify g as 2.128, while alpha is determined to be approximately 0.045. The critically damped condition for the film is also examined to extract alpha in the critically damped case under a range of externally applied bias fields. It is concluded that for monolithic power inductors, improved device performance can be achieved when the ferromagnetic core is in an underdamped state up to a critical frequency. en
dc.description.sponsorship Enterprise Ireland [PHMIS CC-2008-2403] en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.uri http://aip.scitation.org/doi/10.1063/1.3276165
dc.rights © 2010, American Institute of Physics. 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 Godsell, J. F., Kulkarni, S., O’Donnell, T. and Roy, S. (2010) 'Precessional dynamics of Ni45Fe55 thin films for ultrahigh frequency integrated magnetics', Journal of Applied Physics, 107(3), 033907 (8pp). doi: 10.1063/1.3276165 and may be found at http://aip.scitation.org/doi/10.1063/1.3276165 en
dc.subject Ferromagnetic resonance en
dc.subject Iron alloys en
dc.subject Magnetic thin films en
dc.subject Nickel alloys en
dc.subject Soft magnetic materials en
dc.title Precessional dynamics of Ni45Fe55 thin films for ultrahigh frequency integrated magnetics en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Saibal Roy, Tyndall National Institute, University College Cork, Cork, Ireland +353-21-490-3000 Email: saibal.roy@tyndall.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Science Foundation Ireland
dc.contributor.funder Enterprise Ireland
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Applied Physics en
dc.internal.IRISemailaddress saibal.roy@tyndall.ie en
dc.identifier.articleid 33907
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Principal Investigator Programme (PI)/06/IN.1/I98/IE/Development of novel nano-composite high-frequency magnetic materials for future microprocessor power delivery/


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