Nonlinear response of permanent dipoles in a mean-field potential to alternating fields

摘要

It is shown how the existing theory of the dynamic Kerr effect and nonlinear dielectric relaxation based on the non-inertial Brownian rotation of non-interacting rigid dipolar particles may be generalized to take into account interparticle interactions using the MaierSaupe mean-field potential. The results suggest that the frequency dependent nonlinear response provides a new method of measuring the Kramers escape rate (or the longest relaxation time). (c) 2006 Published by Elsevier B.V.