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Optical crystallographic study of piezoelectric KxNa1−xNbO3 (x = 0.4, 0.5 and 0.6) single crystals using linear birefringence
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Gupta, Shashaank, Huband, Steven, Keeble, Dean Samuel, Walker, David, Thomas, Pam A., Viehland, Dwight and Priya, Shashank (2013) Optical crystallographic study of piezoelectric KxNa1−xNbO3 (x = 0.4, 0.5 and 0.6) single crystals using linear birefringence. CrystEngComm, Volume 15 (Number 34). pp. 6790-6799. doi:10.1039/c3ce40627j ISSN 1466-8033.
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Official URL: http://dx.doi.org/10.1039/C3CE40627J
Abstract
In this study, we report an optical crystallographic study of KxNa1−xNbO3 (x = 0.4, 0.5 and 0.6) single crystals in the temperature range of 30–600 °C. At room temperature, these three compositions were found to exhibit monoclinic MC, monoclinic MA/MB and orthorhombic symmetries respectively. All the compositions showed a transformation to tetragonal and to cubic symmetries around 200 °C and 400 °C respectively. In the tetragonal phase field (200–400 °C), coexistence of a lower symmetry phase was also evident. In the paraelectric regime (400–600 °C), all crystals exhibited non-zero birefringence, suggestive of deviation from ideal cubic symmetry m[3 with combining macron]m. Furthermore, crystals of the morphotropic phase boundary composition (x = 0.5) were found to have very small and organized domains, as compared to the other two compositions.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | CrystEngComm | ||||
Publisher: | Royal Society of Chemistry | ||||
ISSN: | 1466-8033 | ||||
Official Date: | September 2013 | ||||
Dates: |
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Volume: | Volume 15 | ||||
Number: | Number 34 | ||||
Page Range: | pp. 6790-6799 | ||||
DOI: | 10.1039/c3ce40627j | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
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