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Title: Phase transition in Pb[(Mg<sub>3/4</sub>Cu<sub>1/4</sub>)<sub>1/3</sub>Nb<sub>2/3</sub>]O<sub>3</sub> ceramic
Authors: Kumar, Amit
Prasad, K
Choudhary, S N
Sinha, T P
Issue Date: Dec-2005
Publisher: CSIR
Series/Report no.: C04B33/00, G01N33/38
Abstract: Single phase perovskite-type cubic ceramics of Pb[(Mg<sub>3/4</sub>Cu<sub>1/4</sub>)<sub>1/3</sub>Nb<sub>2/3</sub>]O<sub>3</sub> (PMCN) were synthesized by high temperature double step solid state reaction technique. Dielectric studies show relaxor behaviour with diffuse phase transition. The phase transition (<i style="">T<sub>m</sub></i>) occurs at -22°C at 10 kHz. The frequency dependence of <i style="">T<sub>m</sub></i> has been modeled using Vogel-Fulcher relation. The dielectric relaxation in PMCN is found analogous to the magnetic relaxation in spin-glass system. The relaxor behaviour in PMCN has also been examined through admittance spectroscopy.
Description: 586-590
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.12(6) [December 2005]

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