Evolution of dielectric and ferroelectric relaxor states in Al3+-doped BaTiO3

Evolution of dielectric and ferroelectric relaxor states in Al3+-doped BaTiO3

In ferroelectric BaTiO3, we report the evolution of the Dielectric Relaxor and Ferroelectric Relaxor states as a function of B-site doped Al3+ concentration. The relaxor states occur after the paraelectric-ferroelectric phase transition upon cooling. Two different mechanisms are proposed; one based...

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Veröffentlicht in:AIP advances 2015-02, Vol.5 (2), p.027135-027135-5
Hauptverfasser: Vani, K., Kumar, Viswanathan
Format: Artikel
Sprache:eng
Schlagworte:
Barium titanates
Dielectric relaxation
Disruption
Evolution
Ferroelectric materials
Ferroelectricity
Migration
Phase transitions
Relaxors
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Zusammenfassung:In ferroelectric BaTiO3, we report the evolution of the Dielectric Relaxor and Ferroelectric Relaxor states as a function of B-site doped Al3+ concentration. The relaxor states occur after the paraelectric-ferroelectric phase transition upon cooling. Two different mechanisms are proposed; one based on migration of oxygen vacancies for symmetry-confirmation and the other based on disruption of long-range ferroelectric order by high concentrations of Al3+ ions at the B-site.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4913918