Neutron powder diffraction study on the crystal and magnetic structures of BiCoO3

Alexei A. Belik; Satoshi Iikubo; Katsuaki Kodama; Naoki Igawa; Shin Ichi Shamoto; Seiji Niitaka; Masaki Azuma; Yuichi Shimakawa; Mikio Takano; Fujio Izumi; Eiji Takayama-Muromachi

doi:10.1021/cm052334z

Neutron powder diffraction study on the crystal and magnetic structures of BiCoO₃

Alexei A. Belik, Satoshi Iikubo, Katsuaki Kodama, Naoki Igawa, Shin Ichi Shamoto, Seiji Niitaka, Masaki Azuma, Yuichi Shimakawa, Mikio Takano, Fujio Izumi, Eiji Takayama-Muromachi

Department of Physics

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306 Citations (Scopus)

Abstract

The crystal and magnetic structures of polycrystalline BiCoO₃ have been determined by the Rietveld method from neutron diffraction data measured at temperatures from 5 to 520 K. BiCoO₃ (space group P4mm; Z = 1; a = 3.72937(7) A and c = 4.72382(15) A at room temperature; tetragonality c/a = 1.267) is isotypic with BaTiO₃ and PbTiO ₃ in the whole temperature range. BiCoO₃ is an insulator with a Néel temperature of 470 K. A possible model for antiferromagnetic order is proposed with a propagation vector of k = (1/2, 1/2, 0). In this model, magnetic moments of Co³⁺ ions are parallel to the c direction and align antiferromagnetically in the ab plane. The antiferromagnetic ab layers stack ferromagnetically along the c axis, forming a C-type antiferromagnetic structure. Refined magnetic moments at 5 and 300 K are 3.24(2)μ_B and 2.93(2)μ_B, respectively. The structure refinements revealed no deviation from stoichiometry in BiCoO₃. BiCoO₃ decomposed in air above 720 K to give 00304 and sillenite-like Bi ₂₅-CoO₃₉.

Original language	English
Pages (from-to)	798-803
Number of pages	6
Journal	Chemistry of Materials
Volume	18
Issue number	3
DOIs	https://doi.org/10.1021/cm052334z
Publication status	Published - 2006 Feb 7

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm052334z

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title = "Neutron powder diffraction study on the crystal and magnetic structures of BiCoO3",

abstract = "The crystal and magnetic structures of polycrystalline BiCoO3 have been determined by the Rietveld method from neutron diffraction data measured at temperatures from 5 to 520 K. BiCoO3 (space group P4mm; Z = 1; a = 3.72937(7) A and c = 4.72382(15) A at room temperature; tetragonality c/a = 1.267) is isotypic with BaTiO3 and PbTiO 3 in the whole temperature range. BiCoO3 is an insulator with a N{\'e}el temperature of 470 K. A possible model for antiferromagnetic order is proposed with a propagation vector of k = (1/2, 1/2, 0). In this model, magnetic moments of Co3+ ions are parallel to the c direction and align antiferromagnetically in the ab plane. The antiferromagnetic ab layers stack ferromagnetically along the c axis, forming a C-type antiferromagnetic structure. Refined magnetic moments at 5 and 300 K are 3.24(2)μB and 2.93(2)μB, respectively. The structure refinements revealed no deviation from stoichiometry in BiCoO3. BiCoO3 decomposed in air above 720 K to give 00304 and sillenite-like Bi 25-CoO39.",

author = "Belik, {Alexei A.} and Satoshi Iikubo and Katsuaki Kodama and Naoki Igawa and Shamoto, {Shin Ichi} and Seiji Niitaka and Masaki Azuma and Yuichi Shimakawa and Mikio Takano and Fujio Izumi and Eiji Takayama-Muromachi",

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T1 - Neutron powder diffraction study on the crystal and magnetic structures of BiCoO3

AU - Belik, Alexei A.

AU - Iikubo, Satoshi

AU - Kodama, Katsuaki

AU - Igawa, Naoki

AU - Shamoto, Shin Ichi

AU - Niitaka, Seiji

AU - Azuma, Masaki

AU - Shimakawa, Yuichi

AU - Takano, Mikio

AU - Izumi, Fujio

AU - Takayama-Muromachi, Eiji

PY - 2006/2/7

Y1 - 2006/2/7

N2 - The crystal and magnetic structures of polycrystalline BiCoO3 have been determined by the Rietveld method from neutron diffraction data measured at temperatures from 5 to 520 K. BiCoO3 (space group P4mm; Z = 1; a = 3.72937(7) A and c = 4.72382(15) A at room temperature; tetragonality c/a = 1.267) is isotypic with BaTiO3 and PbTiO 3 in the whole temperature range. BiCoO3 is an insulator with a Néel temperature of 470 K. A possible model for antiferromagnetic order is proposed with a propagation vector of k = (1/2, 1/2, 0). In this model, magnetic moments of Co3+ ions are parallel to the c direction and align antiferromagnetically in the ab plane. The antiferromagnetic ab layers stack ferromagnetically along the c axis, forming a C-type antiferromagnetic structure. Refined magnetic moments at 5 and 300 K are 3.24(2)μB and 2.93(2)μB, respectively. The structure refinements revealed no deviation from stoichiometry in BiCoO3. BiCoO3 decomposed in air above 720 K to give 00304 and sillenite-like Bi 25-CoO39.

AB - The crystal and magnetic structures of polycrystalline BiCoO3 have been determined by the Rietveld method from neutron diffraction data measured at temperatures from 5 to 520 K. BiCoO3 (space group P4mm; Z = 1; a = 3.72937(7) A and c = 4.72382(15) A at room temperature; tetragonality c/a = 1.267) is isotypic with BaTiO3 and PbTiO 3 in the whole temperature range. BiCoO3 is an insulator with a Néel temperature of 470 K. A possible model for antiferromagnetic order is proposed with a propagation vector of k = (1/2, 1/2, 0). In this model, magnetic moments of Co3+ ions are parallel to the c direction and align antiferromagnetically in the ab plane. The antiferromagnetic ab layers stack ferromagnetically along the c axis, forming a C-type antiferromagnetic structure. Refined magnetic moments at 5 and 300 K are 3.24(2)μB and 2.93(2)μB, respectively. The structure refinements revealed no deviation from stoichiometry in BiCoO3. BiCoO3 decomposed in air above 720 K to give 00304 and sillenite-like Bi 25-CoO39.

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Neutron powder diffraction study on the crystal and magnetic structures of BiCoO₃

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