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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

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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
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:
DateEvent
December 2004Published
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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