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Effect of local A-site strain on dipole stability in A6GaNb9O30 (A = Ba, Sr, Ca) tetragonal tungsten bronze relaxor dielectrics

Miller, Andrew J., Rotaru, Andrei, Arnold, Donna C., Morrison, Finlay D. (2015) Effect of local A-site strain on dipole stability in A6GaNb9O30 (A = Ba, Sr, Ca) tetragonal tungsten bronze relaxor dielectrics. Dalton Transactions, 44 (23). pp. 10738-10745. ISSN 1477-9226. E-ISSN 1477-9234. (doi:10.1039/C4DT03936J) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:59967)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1039/C4DT03936J

Abstract

A series of isovalently A-site substituted relaxor dielectric tetragonal tungsten bronzes of general formula Ba6?x?ySrxCayGaNb9O30 were investigated. The long-range (average) crystal structure as determined by conventional diffraction techniques varies monotonically according to Vegard's law. The dielectric properties, however, do not display a similar, simple “average size” dependence and instead show a dependence on the statistical size variance, i.e. size mismatch, of the A-cation. The difficulties in Vogel–Fulcher analysis of relative permittivity and the complementary approach of using dielectric loss data fitted to Jonscher's empirical universal dielectric relaxation model is discussed.

Item Type: Article
DOI/Identification number: 10.1039/C4DT03936J
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Donna Arnold
Date Deposited: 20 Jan 2017 14:49 UTC
Last Modified: 29 May 2019 18:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/59967 (The current URI for this page, for reference purposes)
Arnold, Donna C.: https://orcid.org/0000-0003-0239-5790
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