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Local distortions in nanostructured ferroelectric ceramics through strain tuning

Philippot, Gilles and Albino, Marjorie and Epherre, Romain and Chevallier, Geoffroy and Beynet, Yannick and Manière, Charles and Weibel, Alicia and Peigney, Alain and Deluca, Marco and Elissalde, Catherine and Maglione, Mario and Aymonier, Cyril and Estournès, Claude Local distortions in nanostructured ferroelectric ceramics through strain tuning. (2015) Advanced Electronic Materials, 1 (10). 1500190/1-1500190/8. ISSN 2199-160X

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Official URL: http://dx.doi.org/10.1002/aelm.201500190

Abstract

Ferroelectric materials are highly sensitive to grain size reduction because strain and ferroelectric polarization have a direct connection. Using 15 nm (Ba,Sr)TiO 3 particles obtained by advanced supercritical synthesis and their densifi cation by high-pressure spark plasma sintering under air, reproducible and dense nanostructured ceramics are achieved. Taking advantage of the high pressure (up to 600 MPa) applied during the sintering step, the internal stress generated at the grain scale can be monitored to compensate for the particle surface stress due to size effect. Both the local dynamics observed by Raman scattering and the overall dielectric behavior consistently indicate a recovery of the ferroelectric properties as the sintering pressure is increased. This unique behavior shows that low-temperature and high-pressure processing enables designing nanostructured functional ceramics exhibiting original properties.

Item Type:Article
Additional Information:Thanks to Wiley editor. The original PDF of the article can be found at http://onlinelibrary.wiley.com/doi/10.1002/aelm.201500190/abstract
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Materials Center Leoben - MCL (AUSTRIA)
Other partners > Université de Bordeaux (FRANCE)
Other partners > Montanuniversität Leoben - MUL (AUSTRIA)
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Deposited By: cirimat webmestre
Deposited On:10 Jul 2017 13:43

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