Superparaelectric phase in the ensemble of non-interacting ferroelectric nanoparticles

Abstract

For the first time we predict the conditions of superparaelectric phase appearance in the ensemble of non-interacting spherical ferroelectric nanoparticles. The superparaelectricity in nanoparticle was defined by analogy with superparamagnetism, obtained earlier in small nanoparticles made of paramagnetic material. Calculations of correlation radius, energetic barriers of polarization reorientation and polarization response to external electric field, were performed within Landau-Ginzburg phenomenological approach for perovskites Pb(Zr,Ti)O3, BiFeO3 and uniaxial ferroelectrics rochelle salt and triglycine sulfate.

28 pages, 7 figures, 3 Appendices, to be submitted to Phys. Rev. B

References in corpus (4)

• Atomistic treatment of depolarizing energy and field in ferroelectric nanostructures
• Phase transitions induced by confinement of ferroic nanoparticles
• Anisotropic Superparamagnetism of Monodispersive Cobalt-Platinum Nanocrystals
• Effect of surface tension and depolarization field on ferroelectric nanomaterials properties

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• Electric Polarization in ErCrO3 Induced by Restricted Polar Domains
• Effect of Rare-Earth Ions on an Electric Polarization Induced by the Phase Separation Domains in RMn2O5 (R = Er, Tb)
• Kinetics of nano-size Ferroelectrics
• Frustration of Exchange-Striction Ferroelectric Ordering and Growth of Electric Polarization of Phase Separation Domains in R${}_{0.8}$Ce${}_{0.2}$Mn${}_2$O${}_5$ (R = Er, Tb) Solid Solutions