JOSSE, Michaël; HEIJBOER, Pierre; ALBINO, Marjorie; MOLINARI, Flora; PORCHER, Florence; DECOURT, Rodolphe; MICHAU, Dominique; LEBRAUD, Eric; VEBER, Philippe; VELAZQUEZ, Matias; MAGLIONE, Mario

doi:10.1021/cg5006049

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JOSSE, Michaël
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

HEIJBOER, Pierre
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

ALBINO, Marjorie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

Ce document a été publié dans

Crystal Growth & Design. 2014, vol. 14, n° 11, p. 5428-5435

American Chemical Society

Résumé en anglais

From room-temperature composite multiferroics to relaxor to ferroelectric crossovers, many original behaviors were recently evidenced in compounds and/or solid solutions related to the Ba2LnFeNb4O15 (Ln = rare earth) family of tetragonal tungsten bronze (TTB) materials. We show how an empirical crystal chemistry approach, while yielding unexpected results, allowed for a better understanding of these original and sometimes specific behaviors. A survey of the dielectric properties of four solid solutions derived from the Ba2NdFeNb4O15 ferroelectric TTB is presented. We also show how the diversity of compositions and chemical substitution patterns unveils the anionic driving force behind the relaxor to ferroelectric crossovers. We finally discuss the probable involvement of aperiodic modulations in these crossovers and the fact that these modulations may constitute an additional degree of freedom to control the properties of TTB structured functional materials.< Réduire

Mots clés en anglais

tetragonal tungsten bronze (TTB) materials

Dielectric properties

Solid solutions

Ferroelectric

DOI

http://dx.doi.org/10.1021/cg5006049

Project ANR

Croissance Cristalline d'Oxydes Dielectriques - ANR-09-JCJC-0079

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Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026