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

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

doi:10.1021/ic402041p

Structure and magnetic properties of BiFe_1-xCo_xO ₃ and Bi_0.9Sm_0.1Fe_1-xCo _xO₃

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

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22 Citations (Scopus)

Abstract

BiFe_1-xCo_xO₃ and Bi_0.9Sm _0.1Fe_1-xCo_xO₃ were synthesized under a high pressure of 4 GPa; 10% Sm substitution for Bi in BiFe _1-xCo_xO₃ (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 (T_C) was observed. Weak ferromagnetism with a spontaneous moment of 0.025 μ_B/formula unit (f.u.) was observed for BiFe _1-xCo_xO₃ (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 language	English
Pages (from-to)	10698-10704
Number of pages	7
Journal	Inorganic chemistry
Volume	52
Issue number	18
DOIs	https://doi.org/10.1021/ic402041p
Publication status	Published - Sept 16 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry

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

abstract = "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.",

author = "Makoto Kubota and Kengo Oka and Hisato Yabuta and Kaoru Miura and Masaki Azuma",

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T1 - Structure and magnetic properties of BiFe1-xCoxO 3 and Bi0.9Sm0.1Fe1-xCo xO3

AU - Kubota, Makoto

AU - Oka, Kengo

AU - Yabuta, Hisato

AU - Miura, Kaoru

AU - Azuma, Masaki

PY - 2013/9/16

Y1 - 2013/9/16

N2 - 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.

AB - 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.

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Structure and magnetic properties of BiFe_1-xCo_xO ₃ and Bi_0.9Sm_0.1Fe_1-xCo _xO₃

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