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Study of structural, magnetic, magnetocaloric properties and critical behavior of CoFeCuO4 spinel ferrite

2021Journal article Restricted access
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dc.contributor.authorNasri, M.
dc.contributor.authorHenchiri, C.
dc.contributor.authorDhahri, R.
dc.contributor.authorKhelifi, J.
dc.contributor.authorDhahri, E.
dc.contributor.authorMariano, José
dc.date.accessioned2021-11-10T17:22:14Z
dc.date.available2021-11-10T17:22:14Z
dc.date.issued2021
dc.description.abstractOur research work centers on studying the structural, magnetic, magnetocaloric properties and the critical behavior of the Cu-substituted CoFe2O4. The XRD analysis revealed that this compound prepared via sol-gel method crystallized in the cubic spinel structure with the Fd3m space group and exhibited nanometric size. In addition, the positive slope in Arrott plots and the universal master curve confirmed the second order ferromagnetic-paramagnetic (FM-PM) phase transition exhibited by our material at a Curie temperature TC = 688 K. Furthermore, it is demonstrated that substituting iron by copper in CoFe2O4 decreases the Curie-temperature and increases the maximum magnetic entropy change. Indeed, for CoFeCuO4, the magnetic entropy change (-Delta SM) rose upon increasing the applied magnetic field and presented a peak around the Curie temperature, its maximum value (-Delta SmaxM ) of 0.6 J.kg- 1.K-1 is reached at mu 0H = 5 T, it corresponds to a relative cooling power (RCP) value of 62.55 J.kg- 1. Moreover, the heat capacity Delta CP was evaluated in order to explore further the performance of our compound with respect to the magnetocaloric effect (MCE). As a final point, the critical exponents were estimated through different experimental and theoretical techniques, they are found reliable obeying to the mean-field model, symptomatic of short-range ferromagnetic interactions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.inoche.2021.108933pt_PT
dc.identifier.issn1387-7003
dc.identifier.urihttp://hdl.handle.net/10400.1/17308
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.subjectSpinel ferritept_PT
dc.subjectSol–gelpt_PT
dc.subjectMagnetic propertiespt_PT
dc.subjectMagnetocaloric propertiespt_PT
dc.subjectCritical exponentspt_PT
dc.titleStudy of structural, magnetic, magnetocaloric properties and critical behavior of CoFeCuO4 spinel ferritept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage108933pt_PT
oaire.citation.titleInorganic Chemistry Communicationspt_PT
oaire.citation.volume133pt_PT
person.familyNameMariano
person.givenNameJosé
person.identifier.ciencia-idDE19-7D9D-00D0
person.identifier.orcid0000-0002-8480-617X
person.identifier.ridO-5252-2018
person.identifier.scopus-author-id12647832000
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication16ee0cfc-3dd4-40fa-8401-b435aa41ef7d
relation.isAuthorOfPublication.latestForDiscovery16ee0cfc-3dd4-40fa-8401-b435aa41ef7d

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