Intrinsic magnetic properties of BixCo2-xMnO 4 spinels obtained by short-time etching

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversité de Rennes 1
dc.date.accessioned2014-05-27T11:30:05Z
dc.date.available2014-05-27T11:30:05Z
dc.date.created2014-05-27T11:30:05Z
dc.date.issued2013-08-01
dc.identifierJournal of Magnetism and Magnetic Materials, v. 339, p. 157-162.
dc.identifier0304-8853
dc.identifierhttp://hdl.handle.net/11449/76136
dc.identifier10.1016/j.jmmm.2013.02.047
dc.identifierWOS:000318904100028
dc.identifier2-s2.0-84876815397
dc.identifier1353862414532005
dc.identifier0000-0002-7734-4069
dc.description.abstractWe report the structural and magnetic properties of Co2MnO 4, partially substituted by Bi at the octahedral site. Bismuth enhances ferromagnetism due to a decrease of the Co2+-Co2+ antiferromagnetic interactions and an increase of the Mn3+-Mn 4+ exchanges. Spurious phases (magnetic and/or nonmagnetic oxides) can easily form because of the large differences between the ionic radii of Bi3+ and Co3+, hiding or altering the intrinsic physical properties of the main BixCo2-xMnO4 phase. An easy way to eliminate the secondary phases is using acid reagents. Short-time etching of Bi0.1Co1.9MnO4 using nitric acid was successfully used, keeping most of the properties of the initial compound, with no alteration of the crystallographic structure. Final stoichiometry was respected (∼Bi0.08Co1.82MnO4), meaning that the material after etching definitely contains bismuth elements in its structure and the observed properties are intrinsic to the oxide spinel. Additional experiments were performed as a function of the synthesis conditions, showing that an optimal pH value of 7 allowed the best magnetic response of the non-doped material. © 2013 Elsevier B.V. All rights reserved.
dc.languageeng
dc.relationJournal of Magnetism and Magnetic Materials
dc.relation3.046
dc.relation0,786
dc.rightsAcesso restrito
dc.sourceScopus
dc.subjectEtching
dc.subjectFerrimagnetism
dc.subjectMultiferroics
dc.subjectOxide spinel
dc.subjectpH
dc.subjectAdditional experiments
dc.subjectAntiferro-magnetic interactions
dc.subjectCrystallographic structure
dc.subjectMagnetic response
dc.subjectOxide spinels
dc.subjectStructural and magnetic properties
dc.subjectSynthesis conditions
dc.subjectBismuth
dc.subjectBismuth compounds
dc.subjectCarbon dioxide
dc.subjectMagnetic properties
dc.subjectManganese
dc.subjectManganese oxide
dc.subjectStoichiometry
dc.subjectCobalt compounds
dc.titleIntrinsic magnetic properties of BixCo2-xMnO 4 spinels obtained by short-time etching
dc.typeArtículos de revistas


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