Caracterização magnética de compósitos multiferróicos particulados Pb(Zr0,52Ti0,48)O4/CoFe2O4

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Jimenez, Korllvary Rhanddy Charles Parra
Orientador(a): Oliveira, Adilson Jesus Aparecido de lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de São Carlos
Programa de Pós-Graduação: Programa de Pós-Graduação em Física - PPGF
Departamento: Não Informado pela instituição
País: BR
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: https://repositorio.ufscar.br/handle/20.500.14289/5067
Resumo: This work was studied the magnetic and electrical properties of particulate multiferroic composite Pb (Zr0,52Ti0,48) O4 / CoFe2O4 (PZT / CFO) (0-3 type) prepared by the polymeric method of Pechini and sintered by ultra-rapid method in microwave and conventional oven, with two molar concentration (80/20 and 50/50). These samples were characterized by ferroelectricity measurements as a function of applied electric field. And magnetization, magnetostriction and magnetoelectric effect as a function of magnetic applied. The main goal of our study was to analyze and characterization of the magnetic and magnetoeletric dependence of particulate composites PZT / CFO, where these samples exhibits two different grains size distribution of cobalt ferrite when compared of grain size average of PZT matrix, with two methods of sintering. We observed these samples present a dependence of the magnetic properties with the methods of sintering and the average grain size of ferrimagnetic phase. This effect was observed in the electric polarization of the ferroelectric PZT. In addition, differences were observed in the magnetic properties 5K and 300K, especially in the coercive field, for samples of cobalt ferrite and composite PZT / CFO 50/50, associated to differences of apparent densities.