Journal article
Symmetry switching of negative thermal expansion by chemical control
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 808.2KB, Terms of use)
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- Publisher copy:
- 10.1021/jacs.5b13192
Authors
- Publisher:
- American Chemical Society
- Journal:
- Journal of the American Chemical Society More from this journal
- Volume:
- 138
- Issue:
- 17
- Pages:
- 5479-5482
- Publication date:
- 2016-02-29
- DOI:
- EISSN:
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1520-5126
- ISSN:
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0002-7863
- Language:
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English
- Keywords:
- Pubs id:
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pubs:609371
- UUID:
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uuid:05a9ff9b-9852-44df-8f5e-fdd09dd8f003
- Local pid:
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pubs:609371
- Source identifiers:
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609371
- Deposit date:
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2016-06-29
- ARK identifier:
Terms of use
- Copyright holder:
- American Chemical Society
- Copyright date:
- 2016
- Notes:
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This is an open access article published under a Creative Commons Attribution (CC-BY: http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html)
License, which permits unrestricted use, distribution and reproduction in any medium,
provided the author and source are cited.
- Licence:
- CC Attribution (CC BY)
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