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Structural coherence and ferroelectricity decay in submicron- and nano-sized perovskites
Department of Physical Inorganic and Structural Chemistry, Stockholm University.ORCID iD: 0000-0003-3060-9987
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2008 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 78, no 5Article in journal (Refereed) Published
Abstract [en]

Understanding the loss of ferroelectricity in submicron- and nano-sized perovskites is an issue that has been debated for decades. Here we report results from a high-energy x-ray diffraction (XRD) study on a prime example of the perovskite's family, BaTiO(3) ceramics with a grain size ranging from 1200 to 5 nm. We find that the loss of ferroelectricity in submicron- and nano-sized BaTiO(3) has an intrinsic origin related to the increased atomic positional disorder in spatially confined physical systems. Our results imply that no particular critical size at which ferroelectricity in BaTO(3), in particular, and perovskites, in general, is completely lost exists. Rather it weakens exponentially with the decreasing of their physical size. Smart technological solutions are needed to bring it back.

Place, publisher, year, edition, pages
2008. Vol. 78, no 5
National Category
Ceramics
Identifiers
URN: urn:nbn:se:kth:diva-89036DOI: 10.1103/PhysRevB.78.054107ISI: 000259368200033OAI: oai:DiVA.org:kth-89036DiVA: diva2:502643
Note
QC 20120305Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2017-12-07Bibliographically approved

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Zhao, Zhe

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