Structure and magnetic properties of BiFe(1-x)Co(x)O3 and Bi0.9Sm0.1Fe(1-x)Co(x)O3

BiFe(1-x)Co(x)O3 and Bi0.9Sm0.1Fe(1-x)Co(x)O3 were synthesized under a high pressure of 4 GPa; 10% Sm substitution for Bi in BiFe(1-x)Co(x)O3 (x ≤ 0.20) drastically destabilized the ferroelectric BiFeO3-type structure and changed it to an antiferroelectric PbZrO3-type superstructure. In comparison,...

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Bibliographic Details
Published in:Inorganic chemistry 2013-09, Vol.52 (18), p.10698-10704
Main Authors: Kubota, Makoto, Oka, Kengo, Yabuta, Hisato, Miura, Kaoru, Azuma, Masaki
Format: Article
Language:English
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Summary:BiFe(1-x)Co(x)O3 and Bi0.9Sm0.1Fe(1-x)Co(x)O3 were synthesized under a high pressure of 4 GPa; 10% Sm substitution for Bi in BiFe(1-x)Co(x)O3 (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-x)Co(x)O3 (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.
ISSN:1520-510X
DOI:10.1021/ic402041p