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Integrated Ferroelectrics
An International Journal
Volume 202, 2019 - Issue 1: Proceedings of the International Conference on Nano-Structured Materials and Devices (ICNSMD-2018): Part I of IV
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Section C: Electrical Properties

Temperature Dependence of Energy Storage Density and Differential Permittivity and Bandgap Study of Relaxor (Pb,La)Zr0.65Ti0.35O3

Shibnath SamantaDepartment of Physics, Indian Institute of Technology Madras, Chennai, India
,
V. SankaranarayananDepartment of Physics, Indian Institute of Technology Madras, Chennai, India
&
K. SethupathiDepartment of Physics, Indian Institute of Technology Madras, Chennai, IndiaCorrespondence[email protected]
Pages 153-162 | Received 01 Oct 2018, Accepted 12 Aug 2019, Published online: 30 Dec 2019
 
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Abstract

Pb(1-3x/2)LaxZr0.65Ti0.35O3 (x = 6, 7, 8 and 9%) show diffusivity values as 1.55, 1.72, 1.94 and 2.18, respectively. The differential permittivity strongly depends on temperature and electric field and get maximum value at certain temperature and fields. These temperatures and fields vary with La-content. The maximum energy storage density observed is 131.90 mJ/cm3 with an efficiency of 82.26% for 6% doped sample. With increasing La-doping it is found to decrease. For 9% doped sample, it is 92 mJ/cm3 with an efficiency of 65%. The bandgap changes from 3.37 eV (6% La) to 3.26 eV (9% La).

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