Ferroelectriclike and pyroelectric behavior of CaCu{sub 3}Ti{sub 4}O{sub 12} ceramics
- Materials Research Centre, Indian Institute of Science, Bangalore 560012 (India)
A ferroelectriclike hysteresis loop was obtained at room temperature for CaCu{sub 3}Ti{sub 4}O{sub 12} (CCTO) ceramic. The remnant polarization and coercive field for 1100 deg. C/5 h sintered CaCu{sub 3}Ti{sub 4}O{sub 12} ceramics were 0.063 {mu}C/cm{sup 2} 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 TiO{sub 6} octahedra.
- OSTI ID:
- 20971847
- Journal Information:
- Applied Physics Letters, Vol. 90, Issue 8; Other Information: DOI: 10.1063/1.2539724; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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