Structure and magnetic properties of BiFe1-xCoxO 3 and Bi0.9Sm0.1Fe1-xCo xO3

Makoto Kubota, Kengo Oka, Hisato Yabuta, Kaoru Miura, Masaki Azuma

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22 Citations (Scopus)


BiFe1-xCoxO3 and Bi0.9Sm 0.1Fe1-xCoxO3 were synthesized under a high pressure of 4 GPa; 10% Sm substitution for Bi in BiFe 1-xCoxO3 (x ≤ 0.20) drastically destabilized the ferroelectric BiFeO3-type structure and changed it to an antiferroelectric PbZrO3-type superstructure. In comparison, a ferroelectric BiCoO3-type tetragonal structure (x ≥ 0.40) was insensitive to the Sm substitution. No decrease in the ferroelectric Curie temperature (TC) was observed. Weak ferromagnetism with a spontaneous moment of 0.025 μB/formula unit (f.u.) was observed for BiFe 1-xCoxO3 (x = 0.10 and 0.20) samples, suggesting the change in the spin structure from a cycloidal one. Because of the coexistence of ferroelectricity and ferromagnetism at room temperature, this compound is a promising multiferroic material.

Original languageEnglish
Pages (from-to)10698-10704
Number of pages7
JournalInorganic chemistry
Issue number18
Publication statusPublished - Sept 16 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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