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Symmetry switching of negative thermal expansion by chemical control
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Senn, Mark S., Murray, Claire A., Luo, Xuan, Wang, Lihai, Huang, Fei-Ting, Cheong, Sang-Wook, Bombardi, Alessandro, Ablitt, Chris, Mostofi, Arash A. and Bristowe, Nicholas C. (2016) Symmetry switching of negative thermal expansion by chemical control. Journal of the American Chemical Society, 138 (17). pp. 5479-5482. doi:10.1021/jacs.5b13192 ISSN 0002-7863.
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Official URL: http://dx.doi.org/10.1021/jacs.5b13192
Abstract
The layered perovskite Ca3–xSrxMn2O7 is shown to exhibit a switching from a material exhibiting uniaxial negative to positive thermal expansion as a function of x. The switching is shown to be related to two closely competing phases with different symmetries. The negative thermal expansion (NTE) effect is maximized when the solid solution is tuned closest to this region of phase space but is switched off suddenly on passing though the transition. Our results show for the first time that, by understanding the symmetry of the competing phases alone, one may achieve unprecedented chemical control of this unusual property.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Journal or Publication Title: | Journal of the American Chemical Society | ||||||||
Publisher: | American Chemical Society | ||||||||
ISSN: | 0002-7863 | ||||||||
Official Date: | 4 May 2016 | ||||||||
Dates: |
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Volume: | 138 | ||||||||
Number: | 17 | ||||||||
Page Range: | pp. 5479-5482 | ||||||||
DOI: | 10.1021/jacs.5b13192 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) |
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