This article is cited in 1 paper

Ferroelectricity

Heat capacity of the 0.7PbNi$_{1/3}$Nb$_{2/3}$O$_3$–0.3PbTiO$_3$ ferroelectric ceramics

S. N. Kallaev^a, Z. M. Omarov^a, R. G. Mitarov^b, K. Bormanis<sup>c

a</sup> Daghestan Institute of Physics after Amirkhanov
^b Daghestan State Technical University
^c Institute of Solid State Physics, Latvian University, Riga, LV-1063, Latvia

Abstract: The temperature dependence of the heat capacity of the 0.7PbNi$_{1/3}$Nb$_{2/3}$O$_3$–0.3PbTiO$_3$ ompound has been studied in the temperature range 120–800 K. The temperature dependence of the heat capacity $C_p$ has two diffuse anomalies in the temperature ranges 250–450 K and 450–650 K and a $\lambda$ anomaly at temperatures $T\approx$ 225 K. The results are discussed with inclusion of the dielectric and structural data.

Received: 28.03.2012

 English version: Physics of the Solid State, 2012, 54:10, 2030–2033

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