Josephson potential in high-Tc superconducting junctions at zero shift current

A new approach to the explanation of induced voltage observed in Josephson structures at zero shift external direct current is proposed and validated. The Josephson effect is investigated on YBaCuO ceramic bridge in magnetic and SHF fields. The experiment shows that the effect of external magnetic field of Be, generated by a solenoid, on the bridge results in VAC shift along the current axis. The obtained experimental results are explained within the framework of the model which considers the bridge as a system of superconducting loops with Josephson transitions