Affiliation:
1. Materials Science Division CSIR‐ National Aerospace Laboratories Bangalore 560017 India
2. Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
3. Centre for Nano Science and Engineering Indian Institute of Science, Bangalore Bangalore 560012 India
4. Physics Center of Minho and Porto Universities (CF‐UM‐UP) University of Minho Campus de Gualtar Braga 4710057 Portugal
5. Materials Research Centre Indian Institute of Science, Bangalore Bangalore 560012 India
Abstract
In this work, the dielectric, ferroelectric, energy storage, electrocaloric (EC), and pyroelectric properties of (Pb0.92La0.08)(Zr0.55Ti0.45)O3 (PLZT) thin film (704 nm) are highlighted. The temperature‐dependent dielectric measurements reveal its relaxor behavior with an excellent tunability (≈64%) and a room‐temperature dielectric constant of ≈1670 at a frequency of 1 kHz. The film demonstrates a recoverable energy storage density of 16.13 J cm−3 and an efficiency of ≈67 %, under an applied field of ≈1915 kV cm−1. The energy storage density of the film exhibits a room‐temperature fatigue endurance of 107 cycles, with a relative deviation of 13%. The EC temperature change (ΔT) and entropy change (ΔS) of 1.42 K and 3.88 J kg−1 K−1, respectively, are measured at near room temperature at 33 MV m−1. In addition, the film demonstrates a high pyroelectric coefficient of 304 μC m−2 K−1 at 293 K. These properties indicate the potential of PLZT film for high‐field energy storage, cooling, and energy‐harvesting applications.