期刊
CURRENT APPLIED PHYSICS
卷 12, 期 5, 页码 1239-1243出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2012.02.046
关键词
Electroceramic; Pulsed laser deposition; Dielectric properties; XRD
资金
- Ministry of Communications and Information Technology (MIT), India [20(11)/2007-VCND]
- DRDO India
We report a comprehensive study on relaxor-like characteristics exhibited by (l00) oriented 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 thin film grown on LaNiO3 coated Si substrate by pulsed laser deposition. The diffuseness coefficient value close to 2 and excellent fit of Vogel-Fulcher curve to the experimental data, suggest its relaxor characteristics. The 'butterfly' shaped dc field dependence of permittivity and evolution of P-E hysteresis loop, at different temperatures, clearly indicate the occurrence of polar nanoregions in this material. The high tunability n(r) similar to 70 and low temperature coefficient TCC = 5.18 x 10(-4) K-1 show that the BCZT50 ceramics could be a promising candidate for tunable capacitor applications. (C) 2012 Elsevier B.V. All rights reserved.
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