Structural, morphological and magnetic characterization of electrodeposited Co-Fe-W alloys

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dc.contributor.authorDella Noce, R. [UNESP]
dc.contributor.authorBenedetti, Assis Vicente [UNESP]
dc.contributor.authorMagnani, M. [UNESP]
dc.contributor.authorPassamani, E. C.
dc.contributor.authorKumar, H.
dc.contributor.authorCornejo, D. R.
dc.contributor.authorOspina, C. A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Espirito Santo
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionBrazilian Nanotechnol Natl Lab
dc.date.accessioned2015-03-18T15:53:33Z
dc.date.available2015-03-18T15:53:33Z
dc.date.issued2014-10-25
dc.description.abstractStructural, morphological and magnetic characterization of electrodeposited Co-Fe-W alloys, containing small amounts of W(up to 9 at.%), were performed using X-ray diffractometry, scanning (SEM) and transmission (TEM) electron microscopy, Mossbauer spectroscopy and magnetization measurements. Electrodeposited (Co-100 Fe-x(x))(100) W-y(y) films (x = 63-72 at.% Fe, y = 4-9 at.% W) were successfully produced varying the applied cathodic current density (i(c)) between 0.5 and 10 mA cm (2). X-ray diffraction results revealed a bcc-like structure for all studied compositions with average crystallite size ranging from 16 to 35 nm, as also confirmed by TEM results. SEM images indicated that needle-type morphology is dominant for the deposits containing lower W content (up to 4.5 at.%.), while a cauliflower-type behavior is observed for higher W content deposits. Room temperature M ssbauer spectra indicate the presence of two magnetic species for all samples; one component associated with an ordered Co-Fe-W fraction (crystalline grain core) and a magnetic disordered Co-Fe-W contribution, which can be attributed to the grain boundaries/grain surfaces. Magnetization was observed to be in the film plane along the film direction, except the sample prepared at i(c) = 10 mA cm (2) that is slightly canted from in-to out-of-plane geometry. Magnetic measurements show high saturation magnetization values accompanied by low coercivity ones for the electrodeposited Co-Fe-W alloys, making these alloys potential materials for applications in magnetic devices such as read/write heads and hard disks. (C) 2014 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUniv Fed Espirito Santo, Dept Fis, BR-29075910 Vitoria, ES, Brazil
dc.description.affiliationUniv Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil
dc.description.affiliationBrazilian Nanotechnol Natl Lab, Electron Microscopy Lab, BR-13083970 Campinas, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipPrope/Unesp
dc.description.sponsorshipFapes
dc.format.extent243-248
dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2014.05.157
dc.identifier.citationJournal Of Alloys And Compounds. Lausanne: Elsevier Science Sa, v. 611, p. 243-248, 2014.
dc.identifier.doi10.1016/j.jallcom.2014.05.157
dc.identifier.issn0925-8388
dc.identifier.urihttp://hdl.handle.net/11449/116588
dc.identifier.wosWOS:000338932400038
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal Of Alloys And Compounds
dc.relation.ispartofjcr3.779
dc.relation.ispartofsjr1,020
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCo-Fe-W alloysen
dc.subjectElectrodepositionen
dc.subjectMossbauer spectroscopyen
dc.subjectX-ray diffractometryen
dc.titleStructural, morphological and magnetic characterization of electrodeposited Co-Fe-W alloysen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1769008264876945[2]
unesp.author.orcid0000-0002-0243-6639[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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