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A structural study of ceramics in the (BiMnO3)x–(PbTiO3)1−x solid solution series
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Woodward, David I. and Reaney, Ian M. (2004) A structural study of ceramics in the (BiMnO3)x–(PbTiO3)1−x solid solution series. Journal of Physics: Condensed Matter, Vol.16 (No.49). pp. 8823-8834. doi:10.1088/0953-8984/16/49/002
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Official URL: http://dx.doi.org/10.1088/0953-8984/16/49/002
Abstract
Ceramics in the (BiMnO3)x–(PbTiO3)1−x series were fabricated with compositions in the range . A macroscopically pseudocubic structure was observed for compositions x>0.4 while at x<0.4 the structure is tetragonal. The presence of a pseudocubic structure is attributed to frustration between different preferred environments of cations, leading to an absence of long-range ordered polar ionic displacements. Microstructures similar to those of relaxors were observed at x = 0.4 and evidence of incommensurate ordering of antiparallel cation displacements was found at compositions. Permittivity measurements for x = 0.3 and 0.4 revealed diffuse frequency-dependent maxima between 100 and 300 °C. In addition, compositions with exhibited a sharp peak at higher temperature. The broad peaks are considered to arise from different time constants attributed to the grain interiors and boundaries for x = 0.3 and 0.4 whereas the sharp peak is interpreted as the Curie temperature of a tetragonal to cubic phase transition.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Condensed matter, Electron microscopy, Solutions, Solid, Electronic ceramics | ||||
| Journal or Publication Title: | Journal of Physics: Condensed Matter | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0953-8984 | ||||
| Official Date: | December 2004 | ||||
| Dates: |
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| Volume: | Vol.16 | ||||
| Number: | No.49 | ||||
| Page Range: | pp. 8823-8834 | ||||
| DOI: | 10.1088/0953-8984/16/49/002 | ||||
| Status: | Peer Reviewed | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | GR/S60037/01 (EPSRC) |
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