Dielectric behavior of SrTiO3 and YiBa2CU3Ox at 10.6 GHz using a microwave resonant cavity as a probe

A cylindrical microwave resonant cavity operating in the TE011 mode was used to study the dielectric response of SrTiO3 and YiBa2CU3Ox. The microwave dielectric response of the powdered samples of these materials is studied as a function of temperature at a frequency of 10.6 GHz. For this study, a very precise heating and cooling system was designed to control the temperature accurately to a tenth of a degree. The real and imaginary parts of the complex permittivity were studied using Slater's Perturbation equations. The relaxation times of these materials are derived using Debye's equations for polar molecules.