Abstract

The results of experiments on the influence of electrostatic field (EF) on the electrophysical parameters of high-T C superconductors are presented. It was shown that action of the negative EF leads to an increase of critical temperature for about 6K in ceramic and about 0.6 K in thin film samples. The action of EF on the fluctuation excess conductivity in YBaCuO thin film was studied. It was shown that EF decreases the amplitude of thermodynamic fluctuations of the order parameter in the domain of 3D fluctuations. The negative EF applied to the film surface has been found to increase the activation energy of flux creep in relatively low magnetic fields. The upper critical magnetic field increases in the vicinity of T C under the influence of the EF.

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