BSCCO superconducting system

Researchers at the University of Tokyo have reported the low temperature in situ growth of superconducting BSCCO films by CVD [238]. Bi(ph)j, Sr(dpm)2, Ca(dpm)2, and Cu(dpm)2 precursors were employed with oxygen at a substrate temperature of 550 °C and a system pressure of 2Torr, thereby producing Bi-2212 films with 7]. = 65 K. In another report, Bi-2212 phase films were grown at a deposition temperature of 500°C by UV-photo-assisted CVD, however, no superconducting transition was noted down to 15 K [239]. 

Superconducting BSCCO films were produced in situ on 3" diameter sapphire substrates by plasma-enhanced halide LPCVD [266, 267]. Films consisting mainly of the Bi-2212 phase were deposited with metal halide precursors at 580°C under 0.1 Torr system pressure in the presence of a rf plasma. These films became superconducting at 70 K with = 2.5 x 10 Acm at 10 K. Plasma-enhanced halide LPCVD was also used to grow Bi-Sr-Ca-Cu-O/Bi-Sr-Cu-O superconductor-normal metal (S-N) heterostructures [259], HRTEM images showed the S/N interface to be atomically abrupt while variable temperature resistivity measurements gave T. = 75 K for the S/N heterostructure. 

IC -Advanced Superconductors manufactures superconductive wire, cable, and tape for MRI diagnostic systems, high-energy physics, and fusion power research. Products are based on NbTi, NbjSn, BSCCO (Bi-Sr-Ca-Cu-O) 2212/Ag, and BSCCO 2223/Ag multi-fUament wire and tape. 

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