Influence of excesses of volatile elements on structure and composition of solution derived lead-free (Bi0.50Na0.50)1xBaxTiO3 thin films

D. Pérez-Mezcua; M.L. Calzada; I. Bretos; J. Ricote; R. Jiménez; L. Fuentes-Cobas; R. Escobar-Galindo; D. Chateigner; R. Sirera

Influence of excesses of volatile elements on structure and composition of solution derived lead-free (Bi0.50Na0.50)1xBaxTiO3 thin films

D. Pérez-Mezcua ¹ M.L. Calzada ¹ I. Bretos ¹ J. Ricote ¹ R. Jiménez ¹ L. Fuentes-Cobas ² R. Escobar-Galindo ¹ D. Chateigner ³ R. Sirera ⁴

1 ICMM - Instituto de Ciencia de Materiales de Madrid

2 CIMAV - Centro de Investigación en Materiales Avanzados

3 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

4 UNAV - Universidad de Navarra [Pamplona]

Abstract : The preparation of (Bi0.50Na0.50)1-xBaxTiO3 films requires a compositional/structural control, as they determine the functionality of these materials. We report a systematic compositional and structural analysis on (Bi0.50Na0.50)1-xBaxTiO3 films fabricated by chemical solution deposition. The effects of incorporating Na(I) and Bi(III) excesses are analyzed through the comparison of the compositional depth profiles of stoichiometric films (BNBT) and films containing excesses (BNBTxs). Heterogeneous compositional profiles with larger bismuth content close to the substrate and thicker film-substrate interfaces are observed in BNBTxs, unlike stoichiometric films, which show atomic concentrations that correspond to the nominal composition of the precursor solution. Excesses induce structural differences in depth, observing a shift of the region of coexistence of rhombohedral and tetragonal phases (morphotropic phase boundary) toward higher x values and the formation of thick film-substrate interfaces. In contrast, stoichiometric films have homogeneous compositional and structural profiles with the MPB placed close to that described for bulk ceramics. © 2015 Elsevier Ltd.

Keywords : Chemical solution deposition Lead-free Morphotropic phase boundary Perovskite Thin film

Type de document :

Article dans une revue

Domaine :

Chimie

Chimie / Cristallographie

Chimie / Chimie théorique et/ou physique

Chimie / Matériaux

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https://hal-normandie-univ.archives-ouvertes.fr/hal-02184705
Contributeur : Université Normandie <>
Soumis le : mardi 16 juillet 2019 - 11:29:37
Dernière modification le : mercredi 17 juillet 2019 - 01:37:27

Influence of excesses of volatile elements on structure and composition of solution derived lead-free (Bi0.50Na0.50)1xBaxTiO3 thin films

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Influence of excesses of volatile elements on structure and composition of solution derived lead-free (Bi0.50Na0.50)1xBaxTiO3 thin films

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