Cation distribution and magnetic characterization of the multiferroic cobalt manganese Co2MnO4 spinel doped with bismuth

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDos Santos, Maria Elenice
dc.creatorAparecido Ferreira, Rafael
dc.creatorLisboa Filho, Paulo Noronha
dc.creatorPeña, Octavio
dc.date2014-05-27T11:28:34Z
dc.date2016-10-25T18:44:58Z
dc.date2014-05-27T11:28:34Z
dc.date2016-10-25T18:44:58Z
dc.date2013-03-01
dc.date.accessioned2017-04-06T02:15:08Z
dc.date.available2017-04-06T02:15:08Z
dc.identifierJournal of Magnetism and Magnetic Materials, v. 329, p. 53-58.
dc.identifier0304-8853
dc.identifierhttp://hdl.handle.net/11449/74674
dc.identifierhttp://acervodigital.unesp.br/handle/11449/74674
dc.identifier10.1016/j.jmmm.2012.09.070
dc.identifierWOS:000311794500010
dc.identifier2-s2.0-84870396337
dc.identifierhttp://dx.doi.org/10.1016/j.jmmm.2012.09.070
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/895435
dc.descriptionThe structural and magnetic properties of the cubic spinel oxide Co 2MnO4 (Fd3m space group) doped with different concentrations of bismuth, were investigated by X-ray diffraction and SQUID magnetometry. The Bi3+ ions entering into the CoIII octahedral sites do not alter the effective moment, μeff ∼8.2 μB, whereas both the magnetization M50 kOe at the highest field (50 kOe) and the field-cooled MFC magnetizations increased when increasing the Bi content. The ferrimagnetic character of the parent compound, Co2MnO4, is maintained for all materials although the antiferromagnetic interactions Co2+-Co2+ are affected, resulting in higher values of the Curie-Weiss temperature. Due to the large ionic radius of Bi, octahedra distortions occur as well as valence fluctuations of the Mn ions, giving rise to Jahn-Teller effects and enhancing the exchange interactions. The off-center Bi3+ ion is responsible of non-centrosymmetric charge ordering and should lead to multiferroïsme conditions for the BixCo2-xMnO4 material. © 2012 Elsevier B.V.
dc.languageeng
dc.relationJournal of Magnetism and Magnetic Materials
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectFerrimagnetism
dc.subjectMagnetic properties
dc.subjectMultiferroic materials
dc.subjectValence fluctuations
dc.subjectAntiferro-magnetic interactions
dc.subjectCation distributions
dc.subjectCharge ordering
dc.subjectCurie-Weiss temperature
dc.subjectIonic radius
dc.subjectMagnetic characterization
dc.subjectMn ions
dc.subjectMultiferroics
dc.subjectNon-centrosymmetric
dc.subjectOctahedral sites
dc.subjectParent compounds
dc.subjectSpace Groups
dc.subjectSpinel oxide
dc.subjectSQUID magnetometry
dc.subjectStructural and magnetic properties
dc.subjectBismuth
dc.subjectCarbon dioxide
dc.subjectCharacterization
dc.subjectCobalt
dc.subjectFerrimagnetic materials
dc.subjectIons
dc.subjectJahn-Teller effect
dc.subjectMagnetization
dc.subjectManganese
dc.subjectManganese oxide
dc.subjectX ray diffraction
dc.subjectCobalt compounds
dc.titleCation distribution and magnetic characterization of the multiferroic cobalt manganese Co2MnO4 spinel doped with bismuth
dc.typeOtro


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