The β-to-γ Transition in BiFeO3: A Powder Neutron Diffraction Study

Donna Claire Arnold; K. S. Knight; G. Catalan; S. A. T. Redfern; James Floyd Scott; Philip Lightfoot; Finlay D. Morrison

doi:10.1002/adfm.201000118

The β-to-γ Transition in BiFeO₃: A Powder Neutron Diffraction Study

Donna Claire Arnold, K. S. Knight, G. Catalan, S. A. T. Redfern, James Floyd Scott, Philip Lightfoot, Finlay D. Morrison

Research output: Contribution to journal › Article › peer-review

88 Citations (Scopus)

Abstract

High-temperature powder neutron diffraction experiments are conducted around the reported beta-gamma phase transition (similar to 930 degrees C) in BiFeO3. The results demonstrate that while a small volume contraction is observed at the transition temperature, consistent with an insulator-metal transition, both the beta- and gamma-phase of BiFeO3 exhibit orthorhombic symmetry; i.e., no further increase of symmetry occurs during this transition. The gamma-orthorhombic phase is observed to persist up to a temperature of approximately 950 degrees C before complete decomposition into Bi2Fe4O9 (and liquid Bi2O3), which subsequently begins to decompose at approximately 960 degrees C.

Original language	English
Pages (from-to)	2116-2123
Number of pages	8
Journal	Advanced Functional Materials
Volume	20
Issue number	13
Early online date	8 Jun 2010
DOIs	https://doi.org/10.1002/adfm.201000118
Publication status	Published - 9 Jul 2010

Access to Document

10.1002/adfm.201000118

2 Finished

RS Fellowship ext to XGLR49: F Morrison Fellowship
Morrison, F. (PI)
The Royal Society
1/10/09 → 30/09/12
Project: Fellowship
Magnetoelectricity & Multiferroic 4133/1: Magnetoelectricity and Multiferroic Behaviour in Tungsten Bronze Oxides
Morrison, F. (PI)
EPSRC
8/01/08 → 7/01/10
Project: Standard

Cite this

@article{0603f4d16a704a17a2c2a1fb9b1e7858,

title = "The β-to-γ Transition in BiFeO3: A Powder Neutron Diffraction Study",

abstract = "High-temperature powder neutron diffraction experiments are conducted around the reported beta-gamma phase transition (similar to 930 degrees C) in BiFeO3. The results demonstrate that while a small volume contraction is observed at the transition temperature, consistent with an insulator-metal transition, both the beta- and gamma-phase of BiFeO3 exhibit orthorhombic symmetry; i.e., no further increase of symmetry occurs during this transition. The gamma-orthorhombic phase is observed to persist up to a temperature of approximately 950 degrees C before complete decomposition into Bi2Fe4O9 (and liquid Bi2O3), which subsequently begins to decompose at approximately 960 degrees C.",

author = "Arnold, {Donna Claire} and Knight, {K. S.} and G. Catalan and Redfern, {S. A. T.} and Scott, {James Floyd} and Philip Lightfoot and Morrison, {Finlay D.}",

note = "Arnold, Donna C. Knight, Kevin S. Catalan, Gustau Redfern, Simon A. T. Scott, James F. Lightfoot, Philip Morrison, Finlay D.",

year = "2010",

month = jul,

day = "9",

doi = "10.1002/adfm.201000118",

language = "English",

volume = "20",

pages = "2116--2123",

journal = "Advanced Functional Materials",

issn = "1616-301X",

publisher = "John Wiley & Sons, Ltd",

number = "13",

}

TY - JOUR

T1 - The β-to-γ Transition in BiFeO3

T2 - A Powder Neutron Diffraction Study

AU - Arnold, Donna Claire

AU - Knight, K. S.

AU - Catalan, G.

AU - Redfern, S. A. T.

AU - Scott, James Floyd

AU - Lightfoot, Philip

AU - Morrison, Finlay D.

N1 - Arnold, Donna C. Knight, Kevin S. Catalan, Gustau Redfern, Simon A. T. Scott, James F. Lightfoot, Philip Morrison, Finlay D.

PY - 2010/7/9

Y1 - 2010/7/9

N2 - High-temperature powder neutron diffraction experiments are conducted around the reported beta-gamma phase transition (similar to 930 degrees C) in BiFeO3. The results demonstrate that while a small volume contraction is observed at the transition temperature, consistent with an insulator-metal transition, both the beta- and gamma-phase of BiFeO3 exhibit orthorhombic symmetry; i.e., no further increase of symmetry occurs during this transition. The gamma-orthorhombic phase is observed to persist up to a temperature of approximately 950 degrees C before complete decomposition into Bi2Fe4O9 (and liquid Bi2O3), which subsequently begins to decompose at approximately 960 degrees C.

AB - High-temperature powder neutron diffraction experiments are conducted around the reported beta-gamma phase transition (similar to 930 degrees C) in BiFeO3. The results demonstrate that while a small volume contraction is observed at the transition temperature, consistent with an insulator-metal transition, both the beta- and gamma-phase of BiFeO3 exhibit orthorhombic symmetry; i.e., no further increase of symmetry occurs during this transition. The gamma-orthorhombic phase is observed to persist up to a temperature of approximately 950 degrees C before complete decomposition into Bi2Fe4O9 (and liquid Bi2O3), which subsequently begins to decompose at approximately 960 degrees C.

U2 - 10.1002/adfm.201000118

DO - 10.1002/adfm.201000118

M3 - Article

SN - 1616-301X

VL - 20

SP - 2116

EP - 2123

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 13

ER -

The β-to-γ Transition in BiFeO3: A Powder Neutron Diffraction Study

Abstract

Access to Document

Fingerprint

Projects

RS Fellowship ext to XGLR49: F Morrison Fellowship

Magnetoelectricity & Multiferroic 4133/1: Magnetoelectricity and Multiferroic Behaviour in Tungsten Bronze Oxides

Cite this

The β-to-γ Transition in BiFeO₃: A Powder Neutron Diffraction Study