Weak ferromagnetism in diamagnetically-doped Bi(1-x)A(x)FeO(3) (A=Ca, Sr, Pb, Ba) multiferroics

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

khomchenko, v. a. (Autor) Outra; kiselev, d. a. (Autor) Outra; seluneva, e. k. (Autor) Outra; vieira, j. m. (Autor) Outra; lopes, a. m. l. (Autor) Outra; pogorelov, y. g. (Autor) FCUP; araujo, j. p. (Autor) FCUP; kholkin, a. l. (Autor) Outra

Revista

Título: Materials Letters

Vol. 62

Páginas: 1927-1929

ISSN: 0167-577X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 81 Citações

Scopus - 84 Citações

Outras Informações

ID Authenticus: P-004-03E

DOI: 10.1016/j.matlet.2007.10.044

Abstract (EN): Investigation of crystal structure, magnetic and local ferroelectric properties of the diamagnetically-doped Bi(1 - x)A(x)FeO(3) (A= Ca, Sr, Ph, Ba; x=0.2, 0.3) ceramic samples has been carried out. It has been shown that the solid solutions have a rhombohedrally distorted perovskite structure described by the space group R3c. Piezoresponse force microscopy data have revealed the existence of the spontaneous ferroelectric polarization in the samples at room temperature. Magnetization measurements have shown that the magnetic state of these compounds is determined by the ionic radius of the substituting elements. A-site substitution with the biggest ionic radius ions has been found to suppress the spiral spin structure of BiFeO(3) and to result in the appearance of weak ferromagnetism. The magnetic properties have been discussed in terms of doping-induced changes in the magnetic anisotropy.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 3