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http://acervodigital.unesp.br/handle/11449/111397
- Title:
- Structural refinement, optical and electrical properties of [Ba1-x Sm-2x/3](Zr0.05Ti0.95)O-3 ceramics
- CV Raman Coll Engn
- Sambalpur Univ
- Inst Minerals & Mat Technol
- Bose Inst
- Indian Inst Sci
- Univ Estadual Piaui
- Universidade Estadual Paulista (UNESP)
- 0957-4522
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- CNPq: 304531/2013-8
- CNPq: 479644/2012-8
- CNPq: 555684/2009-1
- Samarium doped barium zirconate titanate ceramics with general formula [Ba1-x Sm-2x/3](Zr0.05Ti0.95)O-3 [x = 0, 0.01, 0.02, and 0.03] were prepared by high energy ball milling method. X-ray diffraction patterns and micro-Raman spectroscopy confirmed that these ceramics have a single phase with a tetragonal structure. Rietveld refinement data were employed to model [BaO12], [SmO12], [ZrO6], and [TiO6] clusters in the lattice. Scanning electron microscopy shows a reduction in average grain size with the increase of Sm3+ ions into lattice. Temperature-dependent dielectric studies indicate a ferroelectric phase transition and the transition temperature decreases with an increase in Sm3+ ion content. The nature of the transition was investigated by the Curie-Weiss law and it is observed that the diffusivity increases with Sm3+ ion content. The ferroelectric hysteresis loop illustrates that the remnant polarization and coercive field increase with an increase in Sm3+ ions content. Optical properties of the ceramics were studied using ultraviolet-visible diffuse reflectance spectroscopy.
- 1-Aug-2014
- Journal Of Materials Science-materials In Electronics. Dordrecht: Springer, v. 25, n. 8, p. 3427-3439, 2014.
- 3427-3439
- Springer
- http://dx.doi.org/10.1007/s10854-014-2035-7
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/111397
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