Enhancement of electrocaloric effect in compositionally graded ferroelectric nanowires

We report on numerical investigation of the electrocaloric effect, an important physical phenomenon in compositionally graded ferroelectric (CGFE) nanowires made of Pb(1−x)SrxTiO3 whose material compositions spatially vary along the longitudinal direction of nanowires. In this study, all numerical evidences are demonstrated through the phase field model based on the Ginzburg–Landau theory. Here, the change of polarization with temperature can be...