2018
DOI: 10.1103/physrevapplied.10.024048
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Tailoring the Electrocaloric Effect by Internal Bias Fields and Field Protocols

Abstract: In acceptor doped ferroelectrics and in ferroelectric films and nanocomposites, defect dipoles, strain gradients, and the electric boundary conditions at interfaces and surfaces often impose internal bias fields. In this work we delicately study the impact of internal bias fields on the electrocaloric effect (ECE), utilizing an analytical model and ab initio-based molecular dynamics simulations. We reveal the complex dependency of the ECE on field protocol and relative strength of internal and external fields.… Show more

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Cited by 14 publications
(6 citation statements)
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“…A depolarization field (E d ) exists near electrodes or FE domain walls if the polarization-induced bound charges are not fully compensated [21,22]. Presumably, the interface between the polar FE phase and the nonpolar AFE phase should also be a location bearing E d .…”
Section: B E D Assisted Afe To Fe Phase Transitionmentioning
confidence: 99%
“…A depolarization field (E d ) exists near electrodes or FE domain walls if the polarization-induced bound charges are not fully compensated [21,22]. Presumably, the interface between the polar FE phase and the nonpolar AFE phase should also be a location bearing E d .…”
Section: B E D Assisted Afe To Fe Phase Transitionmentioning
confidence: 99%
“…The effect of bias electric or magnetic fields have previously been considered in a few caloric materials. The effect of an internal bias electric field has been examined in an analytical Landau model of an electrocaloric material [72]. The effect of a biasing external magnetic field 425 has been considered for direct (induction-based) TMG cycles on a Heusler alloy with a first order magnetostructural transition, with the motivation of converting as much magnetic work into electricity as possible [73].…”
Section: Soft Ferromagnets Biased By a Hard Magnetmentioning
confidence: 99%
“…The effect of bias electric or magnetic fields have previously been considered in a few caloric materials. The effect of an internal bias electric field has been examined in an analytical Landau model of an electrocaloric material [72]. The effect of a biasing external magnetic field has been considered for direct (induction-based) TMG cycles on a Heusler alloy with a first order magnetostructural transition, with the motivation of converting as much magnetic work into electricity as possible [73].…”
Section: Soft Ferromagnets Biased By a Hard Magnetmentioning
confidence: 99%