Structural refinement, optical and electrical properties of Ba1-x Sm-2x/3 (Zr0.05Ti0.95)O-3 ceramics

Abstract: Samarium doped barium zirconate titanate ceramics with general formula [Ba1−x Sm2x/3](Zr0.05Ti0.95)O3 [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.

Author(s): Badapanda, T.; Sarangi, S.; Behera, B.; et al.

Journal of Materials Science-Materials in Electronics

Volume: 25 Issue: 8 Pages: 3427-3439 Published: 2014

DOI: http://doi.org/10.1007/s10854-014-2035-7

PDF: Structural refinement, optical and electrical properties of Ba1-x Sm-2x 3 (Zr0.05Ti0.95)O-3 ceramics