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http://hdl.handle.net/10773/20335
Título: | Structural, dielectric and impedance spectroscopy studies in (Bi0.90R0.10)Fe0.95Sc0.05O3 [R = La, Nd] ceramics |
Autor: | Coondoo, Indrani Panwar, Neeraj Rafiq, Muhammad Asif Puli, Venkata S. Rafiq, Muhammad Nadeem Katiyar, Ram S. |
Palavras-chave: | BIFEO3 THIN-FILMS FERROELECTRIC PROPERTIES DOPED BIFEO3 RARE-EARTH RELAXATION CRYSTAL PURE |
Data: | 2014 |
Editora: | ELSEVIER SCI LTD |
Resumo: | Polycrystalline BiFeO3 and Bi0.90R0.10)Fe0.95Sc0.05O3 [R=La, Nd] ceramics were synthesized by solid-state reaction method. XRD studies confirmed the formation of single-phase compositions. The particle sizes obtained from XRD data were 43, 31 and 30 nm for BFO, BLFSO and BNFSO, respectively. Dielectric studies revealed anomalies around 200 degrees C and near the Neel temperature. The latter is attributed to the phase transition as an influence of vanishing magnetic order on the electric order usually observed in magneto-electric ordered systems. Complex impedance spectroscopy (CIS) technique was utilized to investigate the intra- and inter-granular contributions to the impedance in the studied compositions as a function of temperature and frequency. CIS studies revealed that the electrical relaxation process was temperature dependent and non-Debye type. AC conductivity studies revealed that conductivity in samples was mainly due to the hopping of oxygen vacancy between the oxidation states (Fe3+/Fe2+) of iron. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20335 |
DOI: | 10.1016/j.ceramint.2014.02.084 |
ISSN: | 0272-8842 |
Versão do Editor: | 10.1016/j.ceramint.2014.02.084 |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Structural dielectric and impedance spectroscopy studies in (Bi 0.90R0.10)Fe0.95Sc0.05O3 [R=La Nd] ceramics_10.1016j.ceramint.2014.02.084.pdf | 725.24 kB | Adobe PDF |
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