Morphologies and structures of Bi-based oxide fibrous crystals

Superconducting fibrous crystals which were long enough for the measurements of many physical properties have been prepared by heating an amorphous plate in a steady stream of oxygen. The fibrous crystals have remarkably oriented structures, and their crystal structures are (2212) single phase, and their compositions approach Bi 2Sr 1Ca 1Cu 2O x . The influence of a partially crystallized substrate without Pb doping on the growth of fibrous crystals has also been discussed briefly.