Pressure-induced spin-state transition in BiCoO3

Kengo Oka; Masaki Azuma; Wei Tin Chen; Hitoshi Yusa; Alexei A. Belik; Eiji Takayama-Muromachi; Masaichiro Mizumaki; Naoki Ishimatsu; Nozomu Hiraoka; Masahiko Tsujimoto; Matthew G. Tucker; J. Paul Attfield; Yuichi Shimakawa

doi:10.1021/ja102987d

Pressure-induced spin-state transition in BiCoO₃

Kengo Oka, Masaki Azuma, Wei Tin Chen, Hitoshi Yusa, Alexei A. Belik, Eiji Takayama-Muromachi, Masaichiro Mizumaki, Naoki Ishimatsu, Nozomu Hiraoka, Masahiko Tsujimoto, Matthew G. Tucker, J. Paul Attfield, Yuichi Shimakawa

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164 Scopus citations

Abstract

The structural and electronic properties of BiCoO₃ under high pressure have been investigated. Synchrotron X-ray and neutron powder diffraction studies show that the structure changes from a polar PbTiO ₃ type to a centrosymmetric GdFeO₃ type above 3 GPa with a large volume decrease of 13% at room temperature Revealing a spin-state change. The first-order transition is accompanied by a drop of electrical resistivity. Structural results show that Co³⁺ is present in the low spin state at high pressures, but X-ray emission spectra suggest that the intermediate spin state is present. The pressure-temperature phase diagram of BiCoO₃ has been constructed enabling the transition temperature at ambient pressure to be estimated as 800-900 K.

Original language	English
Pages (from-to)	9438-9443
Number of pages	6
Journal	Journal of the American Chemical Society
Volume	132
Issue number	27
DOIs	https://doi.org/10.1021/ja102987d
State	Published - Jul 14 2010
Externally published	Yes

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title = "Pressure-induced spin-state transition in BiCoO3",

abstract = "The structural and electronic properties of BiCoO3 under high pressure have been investigated. Synchrotron X-ray and neutron powder diffraction studies show that the structure changes from a polar PbTiO 3 type to a centrosymmetric GdFeO3 type above 3 GPa with a large volume decrease of 13% at room temperature Revealing a spin-state change. The first-order transition is accompanied by a drop of electrical resistivity. Structural results show that Co3+ is present in the low spin state at high pressures, but X-ray emission spectra suggest that the intermediate spin state is present. The pressure-temperature phase diagram of BiCoO3 has been constructed enabling the transition temperature at ambient pressure to be estimated as 800-900 K.",

author = "Kengo Oka and Masaki Azuma and Chen, {Wei Tin} and Hitoshi Yusa and Belik, {Alexei A.} and Eiji Takayama-Muromachi and Masaichiro Mizumaki and Naoki Ishimatsu and Nozomu Hiraoka and Masahiko Tsujimoto and Tucker, {Matthew G.} and Attfield, {J. Paul} and Yuichi Shimakawa",

year = "2010",

month = jul,

day = "14",

doi = "10.1021/ja102987d",

language = "English",

volume = "132",

pages = "9438--9443",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Pressure-induced spin-state transition in BiCoO3

AU - Oka, Kengo

AU - Azuma, Masaki

AU - Chen, Wei Tin

AU - Yusa, Hitoshi

AU - Belik, Alexei A.

AU - Takayama-Muromachi, Eiji

AU - Mizumaki, Masaichiro

AU - Ishimatsu, Naoki

AU - Hiraoka, Nozomu

AU - Tsujimoto, Masahiko

AU - Tucker, Matthew G.

AU - Attfield, J. Paul

AU - Shimakawa, Yuichi

PY - 2010/7/14

Y1 - 2010/7/14

N2 - The structural and electronic properties of BiCoO3 under high pressure have been investigated. Synchrotron X-ray and neutron powder diffraction studies show that the structure changes from a polar PbTiO 3 type to a centrosymmetric GdFeO3 type above 3 GPa with a large volume decrease of 13% at room temperature Revealing a spin-state change. The first-order transition is accompanied by a drop of electrical resistivity. Structural results show that Co3+ is present in the low spin state at high pressures, but X-ray emission spectra suggest that the intermediate spin state is present. The pressure-temperature phase diagram of BiCoO3 has been constructed enabling the transition temperature at ambient pressure to be estimated as 800-900 K.

AB - The structural and electronic properties of BiCoO3 under high pressure have been investigated. Synchrotron X-ray and neutron powder diffraction studies show that the structure changes from a polar PbTiO 3 type to a centrosymmetric GdFeO3 type above 3 GPa with a large volume decrease of 13% at room temperature Revealing a spin-state change. The first-order transition is accompanied by a drop of electrical resistivity. Structural results show that Co3+ is present in the low spin state at high pressures, but X-ray emission spectra suggest that the intermediate spin state is present. The pressure-temperature phase diagram of BiCoO3 has been constructed enabling the transition temperature at ambient pressure to be estimated as 800-900 K.

UR - http://www.scopus.com/inward/record.url?scp=77955798746&partnerID=8YFLogxK

U2 - 10.1021/ja102987d

DO - 10.1021/ja102987d

M3 - Article

AN - SCOPUS:77955798746

SN - 0002-7863

VL - 132

SP - 9438

EP - 9443

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 27

ER -

Pressure-induced spin-state transition in BiCoO₃

Abstract

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