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Coupling between octahedral tilting and ferroelectric order in tetragonal tungsten bronze-structured dielectrics
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Levin, I., Stennett, Martin C., Miles, Gabrielle C., Woodward, David I., West, Anthony R. and Reaney, Ian M. (2006) Coupling between octahedral tilting and ferroelectric order in tetragonal tungsten bronze-structured dielectrics. Applied Physics Letters, Vol.89 (No.12). 122908/1-122908/3. doi:10.1063/1.2355434 ISSN 00036951.
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Official URL: http://dx.doi.org/10.1063/1.2355434
Abstract
Strong coupling between local polar displacements and a commensurate octahedral tilting is proposed to explain the onset of classic ferroelectric behavior in tetragonal tungsten bronzelike dielectrics Ba2LaxNd1−xNb3Ti2O15. The ferroelectric phase transition is associated with a discontinuous non-lock-in transformation of an incommensurate tilted structure to a commensurate superstructure. In a manner reminiscent of perovskitelike oxides, the driving force for commensurate tilting increases as the average ionic radius of the rare-earth ion decreases; no classical ferroelectric transition is observed for compositions with x>0.75, which remain incommensurate and exhibit only relaxor behavior below room temperature.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Ferroelectricity, Dielectrics, Tungsten bronze, Electronic ceramics | ||||
Journal or Publication Title: | Applied Physics Letters | ||||
Publisher: | American Institute of Physics | ||||
ISSN: | 00036951 | ||||
Official Date: | 2006 | ||||
Dates: |
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Volume: | Vol.89 | ||||
Number: | No.12 | ||||
Number of Pages: | 3 | ||||
Page Range: | 122908/1-122908/3 | ||||
DOI: | 10.1063/1.2355434 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Version or Related Resource: | Also presented at ISAF 2007: Sixteenth IEEE International Symposium on Applications of Ferroelectics, Naro, Japan, May 27-31, 2007. http://wrap.warwick.ac.uk/id/eprint/36472 | ||||
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