Summary

Here, we calculated the electronic and ionic polarizability and the polarizations of the dielectric using electronic charge dipoles and ionic lattice having charges coupled as springs. In case of electronic polarizability, we see that the larger the ion is, the higher is the polarizability. On the other hand, ionic polarizability is inversely proportional to the elastic modulus which is related to the bond strength. Hence, the higher the bond strength is, the lower is the ionic polarization. Finally we calculated the dipolar polarization using random dipole model and Boltzman statistics. Here, we saw that polarizability is inversely related to the temperature which explains the drop in the polarization of a polar solid upon increasing the temperature.

Next, we will investigate the behavior of dielectric under alternating fields.