The Effects of Hydrogen Reduction on Magnetic Properties of Barium Ferrite Particles
| hal.structure.identifier | Research Center | |
| dc.contributor.author | HONG, Y. K. | |
| hal.structure.identifier | Research Center | |
| dc.contributor.author | JUNG, H. S. | |
| hal.structure.identifier | Research Center | |
| dc.contributor.author | HUR, N. P. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MATAR, Samir F. | |
| dc.date.created | 1997 | |
| dc.date.issued | 1997 | |
| dc.identifier.issn | 1155-4339 | |
| dc.description.abstractEn | A 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.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | Barium | |
| dc.subject.en | Ferrites | |
| dc.subject.en | Hydrogen | |
| dc.subject.en | Chemical reduction | |
| dc.title.en | The Effects of Hydrogen Reduction on Magnetic Properties of Barium Ferrite Particles | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/jp4:19971127 | |
| dc.subject.hal | Physique [physics]/Articles anciens | |
| bordeaux.journal | Journal de Physique IV Proceedings | |
| bordeaux.page | C1-321-C1-322 | |
| bordeaux.volume | 07 | |
| bordeaux.issue | C1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | jpa-00254769 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//jpa-00254769v1 | |
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