Il'yenko K. The nonlinear interaction of electromagnetic waves in hard superconductors in the critical state

Objects: specific nonlinearity of hard superconductors in the critical state. Goals: theoretical prediction of new physical effects in radiowave interaction. Methods: analytical and numerical integration of nonlinear electrodynamical equations, extraction of magnetic field dependence of the critical current density, learning the conditions of the jumps of surface electric field, analysis of static magnetic moment. New results: Determined that nontrivial magnetic field dependence of critical current density leads to interaction of radiowave with the constant magnetic field. A method of determination of parameters of the critical state model is put forward. We were first who predicted a new phenomenon of jumps in the time dependence of the surface electric field. A suppression of static magnetic moment under the action of orthogonal ac magnetic field is predicted.