Electric field induced phase transition and electrocaloric effect in PMN-PT

H. H. Wu; R. E. Cohen

doi:10.1103/PhysRevB.96.054116

Electric field induced phase transition and electrocaloric effect in PMN-PT

Materials Science 2017-08-29 v2

Authors: H. H. Wu , R. E. Cohen

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Abstract

Ferroelectric perovskite oxides possess a large electrocaloric (EC) effect, but usually at high temperatures near the ferroelectric/paraelectric phase transition temperature, which limits their potential application as next-generation solid-state cooling devices. We use classical molecular dynamics to study the electric field induced phase transitions and EC effect in PMN-PT (PbMg1/3Nb2/3O3-PbTiO3). We find that the maximum EC strength of PMN-PT occurs within the morphotropic phase boundary (MPB) region at 300 K. The large adiabatic temperature change is caused by easy rotation of polarization within the MPB region.

Keywords

ferroelectric magnetization ferroelectric thin films

Cite

@article{arxiv.1706.01034,
  title  = {Electric field induced phase transition and electrocaloric effect in PMN-PT},
  author = {H. H. Wu and R. E. Cohen},
  journal= {arXiv preprint arXiv:1706.01034},
  year   = {2017}
}

Comments

17 pages, 7 figures

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