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

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.

arXiv comment17 pages, 7 figures

References in corpus (10)

• Giant electrocaloric effect in thin film Pb Zr_0.95 Ti_0.05 O_3
• Ab initio study of ferroelectric domain walls in PbTiO3
• Giant electrocaloric effect around T${}_c$
• First principles-based calculation of the electrocaloric effect in BaTiO${}_3$: comparison between direct and indirect methods
• The electrocaloric effect in BaTiO${}_3$ at all three ferroelectric transitions: anisotropy and inverse caloric effects
• First principles based atomistic modeling of phase stability in PMN-xPT
• Influence of defects on ferroelectric and electrocaloric properties of BaTiO${}_3$
• Positive and negative electrocaloric effect in BaTiO${}_3$ in the presence of defect dipoles
• Origin of Diffuse Scattering in Relaxor Ferroelectrics
• Shell Model of BaTiO3 Derived from Ab-initio Total Energy Calculations

Cited by in corpus (5)

• Mechanisms of pyroelectricity in three- and two-dimensional materials
• Giant electrocaloric response in the prototypical Pb(Mg,Nb)O${}_3$ relaxor ferroelectric from atomistic simulations
• Giant electrocaloric effect at the antiferroelectric-to-ferroelectric phase boundary in PbZrTiO${}_3$
• Polarization rotation and the electrocaloric effect in barium titanate
• Field-Induced Ferroelectric Phase Transition Dynamics in PMN-PT compositions near the Morphotropic Phase Boundary