Observation Of Dielectric Relaxor Behavior In Pb0.95Sr0.05(Zr0.5Ti0.5)O3 Ceramics

¹Department of Physics, Indian Institute of Technology, Kharagpur 721302, India

²Department of Physics, Rajiv Gandhi universities of knowledge Technologies, RK Valley 516329, India

³Department of Physics, Acharya Narendra Dev College, University of Delhi, New Delhi 110019 India

⁴Department of Physics, Bundelkhand University, Jhansi (U.P.) 284002, India

⁵Department of Physics, Institute of Technical Education and Research SOA University, Bhubaneswar 751 030, India

Adv. Mater. Lett., 2015, 6 (4), pp 284-289

DOI: 10.5185/amlett.2015.6618

Publication Date (Web): Mar 21, 2015

Copyright © IAAM-VBRI Press

E-mail: mukul.ptr@gmail.com

Abstract

We reports structural, microstructural and dielectric characteristics of Sr²⁺ doped PZT (50/50) ceramic. X-ray diffraction reveals that the system exhibit coexistence of two phases (Tetragonal and rhombohedral) at room temperature. Typical relaxor behavior was observed by the dielectric studies and confirmed by Vogul-Fulcher fitting. The observed relaxor was predicted as existence of nanopolar regions due to short range ordering in presence of oxygen vacancies. The evidence for oxygen vacancies was studied by conductivity and polarization studies. Moreover, at 270 °C one more phase transition is noted which was ascribed to structural phase transition. Present study has scientific significance to distinguish the performance of oxygen vacancies in ferroelectric materials.

Keywords

Phase transition, hysteresis, oxygen vacancy, conductivity.