Fe3+/Nb5+ co-doping effects on the properties of Aurivillius Bi4Ti3O12 ceramics
| Autor: | M. G. Stachiotti, Cristian Lavado |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Ciencias Físicas 02 engineering and technology 01 natural sciences Aurivillius 0103 physical sciences DIELECTRIC RESPONSE Materials Chemistry Ceramic SOLID STATE REACTION 010302 applied physics FERROELECTRICS biology Condensed matter physics Mechanical Engineering Otras Ciencias Naturales y Exactas Doping Metals and Alloys 021001 nanoscience & nanotechnology biology.organism_classification Dielectric response Mechanics of Materials CERAMICS visual_art visual_art.visual_art_medium 0210 nano-technology CIENCIAS NATURALES Y EXACTAS Física de los Materiales Condensados |
| Zdroj: | Journal of Alloys and Compounds. 731:914-919 |
| ISSN: | 0925-8388 |
| Popis: | Bi4Ti3-x(Nb0.5Fe0.5)xO12 (BTFNx) ceramics with 0 ≤ x ≤ 2 were synthesized to evaluate the effect of Fe3+/Nb5+ co-substitution into the B-site of Bi4Ti3O12 (BIT). We show that the XRD pattern for the compounds with x ≤ 1 is the characteristic one of a layered perovskite structure belonging to the n = 3 member of the Aurivillius family. Impurity peaks assigned to a pyrochlore phase are detected at higher concentrations. Raman measurements corroborated that Fe3+and Nb5+ ions are incorporated into the Ti sites of the Aurivillius compound. Frequency dependent dielectric studies at room-temperature displayed the reduction of both dielectric constant and loss tangent with substitution, while the electric-field-induced polarization switching behavior indicates ferroelectric character. It is observed that the ferroelectric transition temperature decreases with increasing Fe/Nb content. Magnetic measurements indicated no evidence of ferromagnetic ordering, but antiferromagnetic spin correlations between Fe3+ ions. Fil: Lavado, Cristian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina Fil: Stachiotti, Marcelo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentina |
| Databáze: | OpenAIRE |
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