| Texto completo | |
| Autor(es): |
Nair, Vishnu R.
;
Raman, T. S. Akhil
;
Alkathy, Mahmoud S.
;
Raju, K. C. James
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 33, n. 17, p. 12-pg., 2022-05-25. |
| Resumo | |
Barium titanate (BaTiO3) ceramics co-substituted with Nickel and Zinc with general formula BaTi1-xNixZnxO3 (x = 0.0, 0.02, 0.04, and 0.08) were synthesized by a microwave-assisted solid-state reaction method. The tetragonal structure was found in both the pure and co-substituted samples. The local distortion of the perovskite structure caused by the co-substitution leads to a decrease in the tetragonality (c/a ratio) of the BaTi1-xNixZnxO3 ceramics. The local structural distortion is linked with a compositional fluctuation resulting from the co-substitution, which leads to a diffusive phase transition and a significant decrease in the Curie temperature of the sintered samples. The Curie temperature drops from 123 oC for pristine BaTiO3 to 104 oC for 8% co-substitution. It was found that the electrical conductivity increases with the co-substitution of Nickel and Zinc, and the conduction mechanism is explained by the nearest neighbor hopping model. (AU) | |
| Processo FAPESP: | 19/03110-8 - Síntese e caracterização fotovoltaica de filmes finos à base de perovskitas ferroelétricas e multiferróicas para aplicação em células solares |
| Beneficiário: | Mahmoud Saleh Mohammed Alkathy |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |