Perekrestov B. Critical current for high-Tc superconductive ceramic Bi2223 under magnetic field and high pressure. Кількісні характеристики дисертації

Objects: the current-transfer capability of weak linked contacts forming at different sintering regime of high temperature Bi2223 ceramics.Goals: clearing up the correlation between the character of intergrain junctions and the critical current density of textured ceramics.Method: experimental measuring the critical transport current of Bi2223 ceramics.New results: for the first time a critical current decrease under high hydrostatic pressure is found.Under magnetic field a normal hysteresis of the critical transport current in Bi2223 samples is found. The existence of SNS weak links in HTSC is experimentally proved.Justified recommendations for choosing the best temperature regime of sintering for manufacturing HTSC ceramics are given.