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hal.structure.identifierResearch Center
dc.contributor.authorHONG, Y. K.
hal.structure.identifierResearch Center
dc.contributor.authorJUNG, H. S.
hal.structure.identifierResearch Center
dc.contributor.authorHUR, N. P.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMATAR, Samir F.
dc.date.created1997
dc.date.issued1997
dc.identifier.issn1155-4339
dc.description.abstractEnA reduction process of the substituted Ba-ferrite has been found to be devided into three steps. At the first and second steps, the magneto-plumbite structure maintains and the coercivity increases. When the reduced-substituted Ba-ferrite particles are reoxidized, the coercivity is reversible in the first step but irreversible in the second step. During the third step, the magneto-plumbite structure was collapsed with formation of α-Fe and BaFeOs-x phases and consequently the coercivity distribution was broad and the coercivity irreversible. The coercivity and saturation magnetization decreases and increases up to 130 emu/g respectively. In this study, it is found that the substituted cations prevent the magneto-plumbite structure from collapse during the reduction process and furthermore migrate from the magnetic sites of 4fIV+2a, 2b, and 12k to 4fVI and 12k'. An increase in the coercivity before the collapse of magneto-plumbite structure is attributed to the migration of substituted cations in hexagonal Ba-ferrite structure.
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enBarium
dc.subject.enFerrites
dc.subject.enHydrogen
dc.subject.enChemical reduction
dc.title.enThe Effects of Hydrogen Reduction on Magnetic Properties of Barium Ferrite Particles
dc.typeArticle de revue
dc.identifier.doi10.1051/jp4:19971127
dc.subject.halPhysique [physics]/Articles anciens
bordeaux.journalJournal de Physique IV Proceedings
bordeaux.pageC1-321-C1-322
bordeaux.volume07
bordeaux.issueC1
bordeaux.peerReviewedoui
hal.identifierjpa-00254769
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//jpa-00254769v1
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