Show simple item record

Article

dc.creatorIpus Bados, Jhon Jairo
dc.creatorJones, N. J.
dc.creatorUcar, H.
dc.creatorMcHenry, M. E.
dc.creatorLaughlin, D. E.
dc.date.accessioned2016-02-02T08:18:13Z
dc.date.available2016-02-02T08:18:13Z
dc.date.issued2012-02-17
dc.identifier.issn0021-8979es
dc.identifier.urihttp://hdl.handle.net/11441/33786
dc.description.abstractThe temperature dependent magnetization of nanocomposite alloys has been fit with a modified Handrich-Kobe equation with an asymmetric exchange fluctuation parameter combined with the Arrott-Noakes equation. The two equations of state are combined to calculate the entropy change in the magnetocaloric effect associated with the ferromagnetic to paramagnetic phase transformation. The complete fit for the M(T) of (Fe70Ni30)88Zr7B4Cu nanocomposite powder is accomplished by combining the two theories. We investigate the broadening of the second-order transition arising from asymmetric exchange parameters and resulting from the fluctuations of interatomic spacing found in an amorphous matrix and the asymmetric dependence of exchange energy on interatomic spacing. The magnetic entropy curve revealed extra broadening with a refrigeration capacity (RC) value of 135 J/kg at 5 T, which is comparable to (Fe76Cr8-xMoxCu1B15) ribbons, which have a RC value of 180 J/kg for the same applied field. Broadening of the magnetic entropy can lead to larger RC values and a wider working temperature range, making nanocomposite alloys promising for magnetocaloric applications.es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherAIP Publishinges
dc.relation.ispartofJournal of Applied Physics, 111,  07A334es
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAmorphous matriceses
dc.subjectApplied fieldes
dc.subjectEntropy changeses
dc.subjectExchange energyes
dc.subjectExchange parameterses
dc.subjectInteratomic spacinges
dc.subjectMagnetic entropyes
dc.subjectMagnetocalorices
dc.subjectNano-composite powderses
dc.subjectNanocomposite alloyses
dc.subjectRefrigeration capacityes
dc.subjectSecond order transitiones
dc.subjectTemperature dependentes
dc.subjectWorking temperatureses
dc.subjectEntropyes
dc.subjectMagnetocaloric effectses
dc.subjectNanocompositeses
dc.subjectParamagnetismes
dc.subjectRefrigerationes
dc.subjectZirconiumes
dc.subjectMagnetic refrigerationes
dc.titleThe effect of distributed exchange parameters on magnetocaloric refrigeration capacity in amorphous and nanocomposite materialses
dc.typeinfo:eu-repo/semantics/articlees
dc.type.versioninfo:eu-repo/semantics/publishedVersiones
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Física de la Materia Condensadaes
dc.relation.publisherversion10.1063/1.3679456es
dc.identifier.doihttp://dx.doi.org/10.1063/1.3679456es
dc.identifier.idushttps://idus.us.es/xmlui/handle/11441/33786

FilesSizeFormatViewDescription
The effect of distributed exchange ...567.1KbIcon   [PDF] View/Open  

This item appears in the following collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as: Attribution-NonCommercial-NoDerivatives 4.0 Internacional