Enhanced in-plane anisotropy and ferromagnetic resonance frequency in permalloy films laminated with nitrogen-doped tantalum

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dc.contributor.authorAnthony, Ricky
dc.contributor.authorHegarty, Margaret
dc.contributor.authorO'Brien, Joe
dc.contributor.authorRohan, James F.
dc.contributor.authorÓ Mathúna, S. Cian
dc.contributor.funderSeventh Framework Programmeen
dc.date.accessioned2019-03-19T14:49:51Z
dc.date.available2019-03-19T14:49:51Z
dc.date.issued2016-12
dc.date.updated2019-03-19T14:45:35Z
dc.description.abstractSoft magnetic materials are used in integrated power magnetic devices (such as micro-inductors and microtransformers) to achieve reasonable inductances at frequencies over a few megahertz. However, the out-of-plane (perpendicular) anisotropy, in thick films produced by vapor deposition, worsens the in-plane soft magnetic properties. This paper reports on the nano-lamination of Permalloy (Ni81Fe19) thin films with the introduction of nitrogen-doped tantalum in between to eliminate the out-of-plane anisotropy and improve the in-plane anisotropy. This significantly improves the in-plane soft magnetic properties, reducing the coercivity from 1352 A/m to 25.5 A/m and increasing the anisotropy field from 180 A/m to 660 A/m. The high-frequency permeability was uniform up to 500 MHz, and the ferromagnetic resonance (FMR) frequency was increased to 1 GHz. These properties are ideal for high efficiency magnetic applications at high frequencies and an extended FMR frequency is imperative for gigahertz-range devices.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationAnthony, R., Hegarty, M., Brien, J. O., Rohan, J. F. and Ó. Mathúna, S. C. (2017) 'Enhanced In-Plane Anisotropy and Ferromagnetic Resonance Frequency in Permalloy Films Laminated With Nitrogen-Doped Tantalum', IEEE Magnetics Letters, 8, pp. 1-4. doi: 10.1109/LMAG.2016.2639471en
dc.identifier.doi10.1109/LMAG.2016.2639471
dc.identifier.endpage4en
dc.identifier.issn1949-307X
dc.identifier.journaltitleIEEE Magnetics Lettersen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/7643
dc.identifier.volume8en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP1::ICT/318529/EU/POWER SoC With Integrated PassivEs/POWERSWIPEen
dc.relation.urihttps://ieeexplore.ieee.org/document/7790890
dc.rights© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.en
dc.subjectSoft magnetic materialsen
dc.subjectAnisotropyen
dc.subjectFerromagnetic resonance frequencyen
dc.subjectMagnetic laminationsen
dc.subjectFilmsen
dc.subjectAnisotropic magnetoresistanceen
dc.subjectSoft magnetic materialsen
dc.subjectSaturation magnetizationen
dc.subjectPerpendicular magnetic anisotropyen
dc.subjectMagnetic resonanceen
dc.subjectCoercive forceen
dc.subjectFerromagnetic resonanceen
dc.subjectLaminatesen
dc.subjectMagnetic anisotropyen
dc.subjectMagnetic thin filmsen
dc.subjectNanocompositesen
dc.subjectNanofabricationen
dc.subjectNitrogenen
dc.subjectPermalloyen
dc.subjectSoft magnetic materialsen
dc.subjectTantalumen
dc.subjectThick filmsen
dc.subjectVapour depositionen
dc.titleEnhanced in-plane anisotropy and ferromagnetic resonance frequency in permalloy films laminated with nitrogen-doped tantalumen
dc.typeArticle (peer-reviewed)en
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