Showing papers by "Andrew K. Jonscher published in 2001"
TL;DR: In this paper, the difference between adiabatic and isothermal susceptibilities is caused by electrocaloric effect, which contributes to dielectric dispersion in a sample of finite dimensions or in a non-homogeneous material.
Abstract: The difference between adiabatic and isothermal susceptibilities is caused by electrocaloric effect. Here we show how this effect contributes to dielectric dispersion in a sample of finite dimensions or in a non-homogeneous material. Maximum contribution to dielectric losses occurs at a frequency that is inversely proportional to the square of characteristic dimension. The first Fourier components of susceptibility in a non-pyroelectric material are proportional to the square of the amplitude of ac field. In a pyroelectric material with temperature dependent susceptibility a contribution to static polarisation arises due to alternating electric field.
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