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dc.contributor.authorStamenov, Plamenen
dc.contributor.authorAckland, Karlen
dc.date.accessioned2020-01-22T17:22:30Z
dc.date.available2020-01-22T17:22:30Z
dc.date.issued2018en
dc.date.submitted2018en
dc.identifier.citationAckland, K. and Masood, A. and Kulkarni, S. and Stamenov, P., Ultra-soft magnetic Co-Fe-B-Si-Nb amorphous alloys for high frequency power applications, AIP Advances, 8, 5, 2018, 056129 -en
dc.identifier.otherYen
dc.identifier.urihttps://aip.scitation.org/doi/10.1063/1.5007707
dc.identifier.urihttp://hdl.handle.net/2262/91366
dc.descriptionPUBLISHEDen
dc.descriptioncited By 0en
dc.description.abstractWith the continuous shrinkage of the footprint of inductors and transformers in modern power supplies, higher flux, while still low-loss metallic replacements of traditional ferrite materials are becoming an intriguing alternative. One candidate replacement strategy is based on amorphous CoFeBSi soft-magnetic alloys, in their metallic glass form. Here the structural and magnetic properties of two different families of CoFeBSi-based soft magnetic alloys, prepared by arc-melting and subsequent melt spinning (rapid quenching) are presented, targeting potential applications at effective frequencies of 100 kHz and beyond. The nominal alloy compositions are Co67Fe4B11Si16Mo2 representing commercial Vitrovac and Co72-xFexB28-y (where B includes non-magnetic elements such as Boron, Silicon etc. x varies between 4 and 5 % and y is varied from 0 to 2 %) denoted Alloy #1 and prepared as a possible higher performance alternative, i.e. lower power loss and lower coercivity, to commercial Vitrovac. Room temperature magnetization measurements of the arc-melted alloys reveal that compared to Vitrovac, Alloy #1 already presents a ten-fold decrease in coercivity, with Hc ∼ 1.4 Am-1 and highest figure of merit of (Ms/Hc > 96). Upon melt-spinning the alloys into thin (< 30 μm) ribbons, the alloys are essentially amorphous when analyzed by XRD. Magnetization measurements of the melt-spun ribbons demonstrate that Alloy #1 possesses a coercivity of just 2 Am-1, which represents a significant improvement compared to melt-spun ribbons of Vitrovac (17 Am-1). A set of prototype transformers of approximately 10 turns of Alloy #1 ribbon exhibits systematically Hc < 10 Am-1 at 100 kHz, without a noticeable decrease in coupled flux and saturation.en
dc.format.extent056129en
dc.language.isoenen
dc.relation.ispartofseriesAIP Advancesen
dc.relation.ispartofseries8en
dc.relation.ispartofseries5en
dc.rightsYen
dc.subjectMagnetic propertiesen
dc.subjectCrystal structureen
dc.subjectInductorsen
dc.subjectFerromagnetic materialsen
dc.subjectChemical elementsen
dc.subjectX-ray diffractionen
dc.subjectTransformeren
dc.subjectTransition metalsen
dc.subjectAlloysen
dc.subjectPhase transitionsen
dc.titleUltra-soft magnetic Co-Fe-B-Si-Nb amorphous alloys for high frequency power applicationsen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/stamenpen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/acklanken
dc.identifier.rssinternalid188930en
dc.identifier.doihttp://dx.doi.org/10.1063/1.5007707en
dc.rights.ecaccessrightsopenAccess
dc.contributor.sponsorGrantNumberSIRGen
dc.contributor.sponsorGrantNumberSFIen
dc.identifier.orcid_id0000-0002-8132-3033en


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