A structural study of ceramics in the (BiMnO3)x–(PbTiO3)1−x solid solution series
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. ISSN 0953-8984Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0953-8984/16/49/002
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.|
|Page Range:||pp. 8823-8834|
|Funder:||Engineering and Physical Sciences Research Council (EPSRC)|
|Grant number:||GR/S60037/01 (EPSRC)|
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