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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Magnetic Properties of Liquid-Phase Sintered CoFe2O4 for Application in Magnetoelastic and Magnetoelectric Transducers

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Othero de Brito, Vera Lucia [1] ; Cunha, Stephanie Ala [1] ; Lemos, Leonardo Violim [1] ; Nunes, Cristina Bormio [2]
Total Authors: 4
[1] Inst Estudos Avancados, BR-12228001 Sao Jose Dos Campos, SP - Brazil
[2] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: SENSORS; v. 12, n. 8, p. 10086-10096, AUG 2012.
Web of Science Citations: 7

Cobalt ferrite is a ferrimagnetic magnetostrictive ceramic that has potential application in magnetoelastic and magnetoelectric transducers. In this work, CoFe2O4 was obtained using a conventional ceramic method and Bi2O3 was used as additive in order to obtain liquid-phase sintered samples. Bi2O3 was added to the ferrite in amounts ranging from 0.25 mol% to 0.45 mol% and samples were sintered at 900 degrees C and 950 degrees C. It was observed the presence of Bi-containing particles in the microstructure of the sintered samples and the magnetostriction results indicated microstructural anisotropy. It was verified that it is possible to get dense cobalt ferrites, liquid-phase sintered, with relative densities higher than 90% and with magnetostriction values very close to samples sintered without additives. (AU)

FAPESP's process: 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry
Grantee:Carlos Alberto Moreira dos Santos
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 09/09524-7 - Characterization of the magnetostriction of cobalt ferrites
Grantee:Vera Lúcia Othéro de Brito
Support Opportunities: Regular Research Grants