Observation of large enhancement in energy-storage properties of lead-free polycrystalline 0.5BaZr(0.2)Ti(0.8)O(3)-0.5Ba(0.7)Ca(0.3)TiO(3) ferroelectric thin films
authors Puli, VS; Pradhan, DK; Coondoo, I; Panwar, N; Adireddy, S; Luo, SJ; Katiyar, RS; Chrisey, DB
nationality International
journal JOURNAL OF PHYSICS D-APPLIED PHYSICS
author keywords ferroelectricity; energy storage; dielectric properties; polycrystalline
keywords DIELECTRIC-PROPERTIES; PHASE-TRANSITION; DENSITY; CAPACITORS; NANOCOMPOSITES; DEPOSITION; BEHAVIOR
abstract Lead-free 0.5BaZr(0.2)Ti(0.8)O(3)-0.5Ba(0.7)Ca(0.3)TiO(3) (BZT-BCT) thin films were deposited on Pt(1 1 1)/TiO2/SiO2/Si substrates by pulsed laser deposition. The optimal ferroelectric response with a high saturation polarization P-s similar to 110 mu C cm(-2), remnant polarization P-r similar to 32.5 mu C cm(-2) along with a coercive field of 0.18 MV cm(-1) was observed from the P-E hysteresis loops under an applied frequency of 1 kHz. A giant recoverable energy-storage density of 93.52 J cm(-3) at an applied electric field similar to 3.47 MV cm(-1) was observed. The optimized BZT-BCT thin films exhibited a high dielectric constant with a low dielectric loss at room temperature like their bulk counterpart (high dielectric constant (epsilon similar to 121 81)) and low dielectric loss (tan delta similar to 0.01-0.03) properties. OPP-PFM images revealed switchable ferroelectric distinct polarization contrasts on the application of a +/- 12 V dc voltage on the conductive tip at room temperature. Observed enhanced dielectric, ferroelectric and energy density properties of BZT-BCT thin films are useful for next generation electrical energy storage applications.
publisher IOP PUBLISHING LTD
issn 0022-3727
isbn 1361-6463
year published 2019
volume 52
issue 25
digital object identifier (doi) 10.1088/1361-6463/ab161a
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000465329600002
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journal analysis (jcr 2019):
journal impact factor 3.169
5 year journal impact factor 2.902
category normalized journal impact factor percentile 71.753
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