YBa2Cu3Oxの超伝導特性におよぼすReO3添加の影響

概要

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To examine the effect of rhenium oxide addition on the superconducting properties of YBCO ceramics, Y1Ba2Cu3RexOy (YBCO) specimens with x=0 to 0.1 were prepared by both conventional sintering and melt-growth methods. It has been found that the addition of ReO3 has significant effects on the critical temperature and critical current density of YBCO superconductors. By addition of Re0.01, the critical temperatures of the sintered and meltgrown specimens were increased to 89.5K and 91.9K, respectively. The maximum critical current densities of the sintered and melt-grown specimens were 396A/cm2 (Re0.01), and 753A/cm2 (Re0.005), respectively. XMA and XRD analyses showed that some Re ion was incorporated in the YBCO crystal.