Superparaelectric phase in the ensemble of non-interacting ferroelectric nanoparticles

Details Superparaelectric phase in the ensemble of non-interacting ferroelectric nanoparticles Superparaelectric phase in the ensemble of non-interacting ferroelectric nanoparticles

2008-06-12

arxiv.org/abs/0806.2127v1

Physics

Condensed Matter

Materials Science

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

Scientific paper

10.1103/PhysRevB.78.134107

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.

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