HIGH TEMPERATURE SUPERCONDUCTOR AND ITS PRODUCTION

摘要

PURPOSE:To obtain a high temp. superconductor not contg. Tl or having a low concn. of Tl. CONSTITUTION:This superconductor has a compsn. represented by (M1-xAx)yCuO1+z (where M is at least one of divalent ions of Ca, Sr, Ba, Hg, Cd and Pb, A is at least one of monovalent ions of Li, Na, K, Rb, Cs and Ag or trivalent ions of Tl and Bi or Y, La and lanthanides, 0