Intermediate structural state in Bi1−x Pr x FeO3 ceramics at the rhombohedral–orthorhombic phase boundary

Crystal structure of the Bi1−xPrxFeO3 ceramics of the compositions corresponding to the threshold concentrations separating the polar rhombohedral (R3c) and anti-polar orthorhombic (Pbam) phases has been investigated with X-ray diffraction, transmission electron microscopy and differential scanning...

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Bibliographic Details
Published in:Journal of materials science 2017-08, Vol.52 (16), p.9355-9362
Main Authors: Karpinsky, D. V., Troyanchuk, I. O., Willinger, M., Khomchenko, V. A., Salak, A. N., Sikolenko, V., Silibin, M. V.
Format: Article
Language:English
Subjects:
Ceramics
Crystal structure
Differential scanning calorimetry
Materials science
Orthorhombic phase
Phase transitions
Scanning electron microscopy
Structural analysis
Transmission electron microscopy
X-ray diffraction
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Summary:Crystal structure of the Bi1−xPrxFeO3 ceramics of the compositions corresponding to the threshold concentrations separating the polar rhombohedral (R3c) and anti-polar orthorhombic (Pbam) phases has been investigated with X-ray diffraction, transmission electron microscopy and differential scanning calorimetry measurements performed in a broad temperature range. The structural study specifies the peculiarities of the temperature-driven transition into the non-polar orthorhombic (Pnma) phase depending on the structural state of the compounds at room temperature. The crystal structure analysis reveals the revival of the anti-polar orthorhombic phase upon the temperature-induced transition, thus assuming that it can be considered as the bridge phase between the polar rhombohedral and the non-polar orthorhombic phases.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-017-1152-0