Cation-size control of structural phase transitions in tin perovskites

Elizabeth H. Mountstevens; J. Paul Attfield; Simon A.T. Redfern

doi:10.1088/0953-8984/15/49/010

Cation-size control of structural phase transitions in tin perovskites

Elizabeth H. Mountstevens^*, J. Paul Attfield, Simon A.T. Redfern

^*Corresponding author for this work

University of Cambridge

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

121 Citations (Scopus)

Abstract

The structural evolution at 300 K of the series Sr_xBa_1-xSnO₃ and Sr_xCa_1-xSnO₃ at x = 0.2 intervals has been determined by powder neutron diffraction. All Sr_xCa_1-xSnO₃ samples (x = 0-1) have the Pbnm superstructure. In the series Sr_xBa_1-xSnO₃, the x = 1.0 and 0.8 samples have the Pbnm superstructure. The x = 0.6 sample has a second orthorhombic structure with space group Imma. There is a tetragonal I4/mcm phase at x = 0.4 and the undistorted cubic Pm3̄m structure for x = 0.2 and BaSnO₃. The octahedral tilt angles show a smooth variation with average A cation radius over the range of superstructures described by mean field theory close to the transition. The transitions are also analysed via the variation of spontaneous strains.

Original language	English
Pages (from-to)	8315-8326
Number of pages	12
Journal	Journal of Physics Condensed Matter
Volume	15
Issue number	49
DOIs	https://doi.org/10.1088/0953-8984/15/49/010
Publication status	Published - Dec 17 2003
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics

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title = "Cation-size control of structural phase transitions in tin perovskites",

abstract = "The structural evolution at 300 K of the series SrxBa1-xSnO3 and SrxCa1-xSnO3 at x = 0.2 intervals has been determined by powder neutron diffraction. All SrxCa1-xSnO3 samples (x = 0-1) have the Pbnm superstructure. In the series SrxBa1-xSnO3, the x = 1.0 and 0.8 samples have the Pbnm superstructure. The x = 0.6 sample has a second orthorhombic structure with space group Imma. There is a tetragonal I4/mcm phase at x = 0.4 and the undistorted cubic Pm{\=3}m structure for x = 0.2 and BaSnO3. The octahedral tilt angles show a smooth variation with average A cation radius over the range of superstructures described by mean field theory close to the transition. The transitions are also analysed via the variation of spontaneous strains.",

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AU - Mountstevens, Elizabeth H.

AU - Attfield, J. Paul

AU - Redfern, Simon A.T.

PY - 2003/12/17

Y1 - 2003/12/17

N2 - The structural evolution at 300 K of the series SrxBa1-xSnO3 and SrxCa1-xSnO3 at x = 0.2 intervals has been determined by powder neutron diffraction. All SrxCa1-xSnO3 samples (x = 0-1) have the Pbnm superstructure. In the series SrxBa1-xSnO3, the x = 1.0 and 0.8 samples have the Pbnm superstructure. The x = 0.6 sample has a second orthorhombic structure with space group Imma. There is a tetragonal I4/mcm phase at x = 0.4 and the undistorted cubic Pm3̄m structure for x = 0.2 and BaSnO3. The octahedral tilt angles show a smooth variation with average A cation radius over the range of superstructures described by mean field theory close to the transition. The transitions are also analysed via the variation of spontaneous strains.

AB - The structural evolution at 300 K of the series SrxBa1-xSnO3 and SrxCa1-xSnO3 at x = 0.2 intervals has been determined by powder neutron diffraction. All SrxCa1-xSnO3 samples (x = 0-1) have the Pbnm superstructure. In the series SrxBa1-xSnO3, the x = 1.0 and 0.8 samples have the Pbnm superstructure. The x = 0.6 sample has a second orthorhombic structure with space group Imma. There is a tetragonal I4/mcm phase at x = 0.4 and the undistorted cubic Pm3̄m structure for x = 0.2 and BaSnO3. The octahedral tilt angles show a smooth variation with average A cation radius over the range of superstructures described by mean field theory close to the transition. The transitions are also analysed via the variation of spontaneous strains.

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Cation-size control of structural phase transitions in tin perovskites

Abstract

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