investigation of Y-Ba-Cu-O type superconductors in pulsed ultrahigh magnetic fields

In this paper a possibility of microelectronic technique devices creation based on high-temperature superconductors (HTS) as well as HTS using in heavy-current electronic and, in particular, in electrical energy storage, radio-frequency accelerators and transmission lines, superconducting solenoids is considered. Critical current Ic and upper critical magnetic field Hc2 are key parameters defining engineering feasibility of HTS. Hc2 measurement near the temperature of a superconducting transition doesn't present any difficulties, but extrapolation of Hc2(T) dependence to a low-temperature region owing to thermal activation processes gives uncertainties in Hc2(OK) value equal to 150-300 T. Prediction of Hc2(OK) values from Hc1 data hindered, since the first critical field is greatly defined by the samples inhomogeneous macrostructure. It has been shown that Hc2 (4.2 K) > 60 T, this is a threshold magnetic field obtained in undestructable pulsed solenoids