Nontrivial dependence of dielectric stiffness and SHG on dc bias in relaxors and dipole glasses

S. A. Prosandeev; I. P. Raevski; A. S. Emelyanov; Eugene V. Colla; J-L. Dellis; M. El Marssi; S. P. Kapphan; L. Jastrabik

doi:10.1063/1.1947392

paper

Nontrivial dependence of dielectric stiffness and SHG on dc bias in relaxors and dipole glasses

arXiv:cond-mat/0410103 · doi:10.1063/1.1947392

Abstract

Dielectric permittivity and Second Harmonic Generation (SHG) studies in the field-cooled mode show a linear dependence of dielectric stiffness (inverse dielectric permittivity) on dc bias in PMN-PT crystals and SHG intensity in KTaO $_{3}$ :Li at small Li concentrations. We explain this unusual result in the framework of a theory of transverse, hydrodynamic-type, instability of local polarization.

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