On the microscopic mechanism for the stabilization of structural and ferroic states in displacive multiferroics

Autor(es)

Freitas, V. F. ^[1] ; Bonadio, T. G. M. ^[1] ; Dias, G. S. ^[1] ; Protzek, O. A. ^[1] ; Medina, A. N. ^[1] ; Cotica, L. F. ^[1] ; Santos, I. A. ^[1] ; Garcia, D. ^[2] ; Eiras, J. A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana - Brazil

^[2] Univ Fed Sao Carlos, Dept Fis, BR-13656905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 113, n. 11 MAR 21 2013.
• Citações Web of Science: 2

Resumo

In this paper, the microscopic mechanism for structural, ferroelectric, and magnetic stabilities in displacive perovskite structured multiferroics is investigated by studying BiFeO3-PbTiO3 solid solutions. The results revealed that thermal stability and ferroic orders are intimately connected with the changes in A and B perovskite sites. The breakdown mechanism of the cycloidal magnetic network, which permits to observe the resulting macroscopic magnetization is reveled, compared, and presented for various compositions of the BiFeO3-PbTiO3 system. The delicate energetic balance that stabilizes the electrically polar structures in displacive perovskite multiferroics is proposed and it was showed that it is fully connected to the configuration (atomic occupancy and formal ionic charge) of each individual site of the perovskite unit cell. (C) 2013 American Institute of Physics. {[}http://dx.doi.org/10.1063/1.4795766] (AU)

• Processo FAPESP: 08/04025-0 - Materiais multifuncionais multiferróicos nanoestruturados: síntese, propriedades, fenomenologia e aplicações
• Beneficiário: José Antonio Eiras
• Modalidade de apoio: Auxílio à Pesquisa - Temático