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Ferro electriclike and pyroelectric behavior of CaCu3Ti4O12 ceramics

Prakash, Shri B and Varma, KBR (2007) Ferro electriclike and pyroelectric behavior of CaCu3Ti4O12 ceramics. In: Applied Physics Letters, 90 (8). 082903-082903.

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Abstract

A ferroelectriclike hysteresis loop was obtained at room temperature for CaCu3Ti4O12 (CCTO) ceramic. The remnant polarization and coercive field for 1100 °C/5 h sintered CaCu3Ti4O12 ceramics were 0.063 μC/cm2 and 195 V/cm, respectively. Remnant polarization increased while the coercive field decreased with increase in sintering temperature/duration, implying that these were microstructural dependent. The observation of the hysteresis loop for CCTO ceramic was corroborated by its pyroelectric behavior, and the pyroelectric current at room temperature was −0.0028 nA. These findings were attributed to the presence of mixed-valent Ti ions, apart from off center displacement of Ti ions in TiO6 octahedra.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 27 Feb 2012 11:12
Last Modified: 27 Feb 2012 11:12
URI: http://eprints.iisc.ernet.in/id/eprint/43019

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