Institute of Physics, University of Pannonia, P.O. Box 158, H-8201 Veszprém, Hungary.
J Chem Phys. 2009 Oct 21;131(15):154905. doi: 10.1063/1.3248242.
The nonlinear dielectric effect for dipolar fluids is studied within the framework of the mean spherical approximation (MSA) of hard core dipolar Yukawa fluids. Based on earlier results for the electric field dependence of the polarization our analytical results show so-called normal saturation effects, which are in good agreement with corresponding NVT ensemble Monte Carlo (MC) simulation data. The linear and the nonlinear dielectric permittivities obtained from MC simulations are determined from the fluctuations of the total dipole moment of the system in the absence of an applied electric field. We compare the MSA based theoretical results with the corresponding Langevin and Debye-Weiss behaviors and with actual experimental data.
本文在硬球偶极 Yukawa 流体的均方球近似（MSA）框架内研究了偶极流体的非线性介电效应。基于我们之前关于极化对电场依赖性的研究结果，我们的分析结果表明存在所谓的正常饱和效应，这与相应的 NVT 系综蒙特卡罗（MC）模拟数据吻合得很好。从没有外加电场的情况下系统总偶极矩的涨落中确定了从 MC 模拟获得的线性和非线性介电常数。我们将基于 MSA 的理论结果与相应的朗之万和德拜-韦斯行为以及实际的实验数据进行了比较。
