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

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dc.contributor.author Anthony, Ricky
dc.contributor.author Hegarty, Margaret
dc.contributor.author O'Brien, Joe
dc.contributor.author Rohan, James F.
dc.contributor.author Ó Mathúna, S. Cian
dc.date.accessioned 2019-03-19T14:49:51Z
dc.date.available 2019-03-19T14:49:51Z
dc.date.issued 2016-12
dc.identifier.citation Anthony, 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.2016.2639471 en
dc.identifier.volume 8 en
dc.identifier.startpage 1 en
dc.identifier.endpage 4 en
dc.identifier.issn 1949-307X
dc.identifier.uri http://hdl.handle.net/10468/7643
dc.identifier.doi 10.1109/LMAG.2016.2639471
dc.description.abstract Soft 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Institute of Electrical and Electronics Engineers (IEEE) en
dc.relation.uri https://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.subject Soft magnetic materials en
dc.subject Anisotropy en
dc.subject Ferromagnetic resonance frequency en
dc.subject Magnetic laminations en
dc.subject Films en
dc.subject Anisotropic magnetoresistance en
dc.subject Soft magnetic materials en
dc.subject Saturation magnetization en
dc.subject Perpendicular magnetic anisotropy en
dc.subject Magnetic resonance en
dc.subject Coercive force en
dc.subject Ferromagnetic resonance en
dc.subject Laminates en
dc.subject Magnetic anisotropy en
dc.subject Magnetic thin films en
dc.subject Nanocomposites en
dc.subject Nanofabrication en
dc.subject Nitrogen en
dc.subject Permalloy en
dc.subject Soft magnetic materials en
dc.subject Tantalum en
dc.subject Thick films en
dc.subject Vapour deposition en
dc.title Enhanced in-plane anisotropy and ferromagnetic resonance frequency in permalloy films laminated with nitrogen-doped tantalum en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother James Rohan, Tyndall Microsystems, University College Cork, Cork, Ireland. +353-21-490-3000 Email: james.rohan@tyndall.ie en
dc.internal.availability Full text available en
dc.date.updated 2019-03-19T14:45:35Z
dc.description.version Accepted Version en
dc.internal.rssid 468876266
dc.internal.rssid 483475847
dc.contributor.funder Seventh Framework Programme en
dc.description.status Peer reviewed en
dc.identifier.journaltitle IEEE Magnetics Letters en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress james.rohan@tyndall.ie en
dc.internal.IRISemailaddress cian.omathuna@tyndall.ie en
dc.relation.project info:eu-repo/grantAgreement/EC/FP7::SP1::ICT/318529/EU/POWER SoC With Integrated PassivEs/POWERSWIPE en

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