Fig. 4
From: Demonstration of ultra-high recyclable energy densities in domain-engineered ferroelectric films
Electrical energy storage capability and dielectric stability. a Thickness-dependent energy storage densities and efficiencies (W C and η) of the BZT films grown on different substrates, the inset shows the typical P – E loops. b Room temperature ε r-E and tgδ-E curves of a 1.8-μm-thick BZT film (on LAO). c W C and η as functions of temperature for the film in b, computed from its temperature-dependent P – E loops (inset). d Room temperature ε r –f and tgδ–f curves for BZT films grown on the same substrates (LAO) but with different thicknesses
