A Phenomenological Theory of Nonlinear Dielectric Response

抄録

The nonlinear after-effect functions and susceptibilities for uniaxial ferroelectrics and ferroelectric liquid crystals are derived on the basis of equations of motion. The ferroelectrics and the ferroelectric liquid crystals are quite different in the functional forms of nonlinear after-effect functions and the nonlinear susceptibilities, though they are the same in those of the linear ones. On the basis of the results the validity of so-called Nakada's formula, which has been often used in analyzing experimental data, is also discussed.