Monte Carlo simulation of the dielectric relaxation mechanism by using the time dependent ising model

The dielectric relaxation properties of the dipolar chain molecules are studied by using time dependent Ising model. Normalized complex permitivity as a function of frequency is derived from the Fourier transform of the time-delayed correlation functions for an infinite dipolar chain and a finite chain-ring using both periodic and open boundary conditions. One dimensional Glauber-kinetic Ising model is extented to the case of concerted motions involving simultaneous reorientation of all elements along the chain. In addition, decay function of a single dipole and decay function of the whole dipolar chain are obtained using Monte Carlo simulations. The results of the analysis show that the relaxation behaviour of this system is in full agreement with KWW decay function. Key Words: Dielectric relaxation, Kinetic Ising model, Monte Carlo simulation.