Cover Page April-2015-Advanced Materials Letters

Advanced Materials Letters

Volume 6, Issue 4, Pages 284-289, April 2015
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Observation Of Dielectric Relaxor Behavior In Pb0.95Sr0.05(Zr0.5Ti0.5)O3 Ceramics

Nawnit Kumar1, Patri Tirupathi2, Bineet Kumar3, Mukul Pastor4*, A. C. Pandey4, R. N. P. Choudhary

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

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.

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