HIGH TEMPERATURE SUPERCONDUCTING COPPER OXIDE HAVING GOOD CRITICAL CURRENT DENSITY PROPERTY AND/OR IRREVERSIBLE MAGNETIC FIELD PROPERTY AND HIGH TEMPERATURE SUPERCONDUCTING MATERIAL CONTAINING IT

摘要

PROBLEM TO BE SOLVED: To provide high temperature superconducting copper oxide expressed by 'X2Z(RE)Cu2O7-z' having critical current density of 1.0×104 A/cm2 or more at 77K and/or irreversible magnetic field of 1T/μ0 or more at 83K.;SOLUTION: The superconducting copper oxide is expressed by the above fomula 'X2Z(RE)Cu2O7-z'; (1) X=Cu1-xQx (Q = one or more kinds of elements selected among Al, Ti and Fe, 0x≤0.2), Z=Ba, RE=one or more kinds of rare earth elements containing Y, (2) X=Cu, Z=Ba1-rSrr (0≤r≤0.4), RE= Yb1-yLuy (0≤y≤1), (3) X=Cu, Z=Ba, RE=Y1-yYby (0y≤1), (4) X=Cu1-xQx (Q = one or more kinds of elements selected among Al, Ti and Fe, 0x≤0.2), Z=Ba1-rSrr (0≤r≤0.4), RE=Yb1-yLuy (0≤y≤1), or (5) X=Cu1-xQx (Q = one or more kinds of elements selected among Al, Ti and Fe, 0x≤0.2), Z=Ba, RE=Y1-yYby (0y≤1).;COPYRIGHT: (C)2002,JPO