Impedance Spectroscopy at Super High Pressures

As is well known, by studying the ac dielectric properties of materials it is rather simple to obtain information on the presence of relaxation processes resulting in additional absorption of energy of the electromagnetic field. These processes can be connected to the structural reorientation of dipoles in the sample and changes in the electronic and ionic characteristics. Besides, these investigations allow to take into account the contribution of surface phenomena to the measured electrical characteristics. Solving these problems is especially interesting for materials at ultrahigh pressures. Measurements over a wide frequency range allow to allocate the contribution in the electrical characteristics bulk of sample, surface, and measuring cell.