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Dielectric response of PLZT ceramics 𝑥/57/43 across ferroelectric– paraelectric phase transition
A K Shukla V K Agrawal I M L Das Janardan Singh S L Srivastava
Volume 34 Issue 1 February 2011 pp 133-142
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https://www.ias.ac.in/article/fulltext/boms/034/01/0133-0142 -
Keywords
PLZT ;dielectric relaxation ;diffuse phase transition. -
Abstract
The dielectric properties of lead lanthanum zirconate titanate (PLZT) ceramics [Pb(Zr0.57Ti0.43)O3 +𝑥 at% of La, 𝑥 = 3, 5, 6, 10 and 12] have been measured in the frequency range 1 Hz–1 MHz using the vector impedance spectroscopy (VIS) at different temperatures. All the compositions show both non-dispersive and dispersive dielectric responses in different temperature regions. The non-dispersive region obeys the universal dielectric response. A low frequency (< 1 kHz) relaxation phenomenon with a high value of distribution parameter `ℎ’ (∼0.4 to 0.6) has been observed in all the compositions around the temperature corresponding to themaximum dielectric constant (𝑇m). The activation energies as calculated from the relaxation and d.c. conduction processes are comparable. The ferroelectric phase transition is diffuse in nature and broadening of the peak increases with La content.
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Author Affiliations
A K Shukla1 2 V K Agrawal1 I M L Das1 Janardan Singh3 S L Srivastava1
- Department of Physics, University of Allahabad, Allahabad 211 002, India
- Department of Physics, Amity Institute of Applied Sciences, Amity University, Noida 201 301, India
- National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110 012, India
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Dates
- Published
- February 2011
- Manuscript received
- 21 July 2009
- Manuscript revised
- 21 July 2010
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