PMQ法により作製されたYb_2BaCuO_5絶縁性基板上へのYbBa_2Cu_3O_x超電導相の形成

概要

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Homogeneous and highly dense insulating Yb_2BaCuO_5 substrates were successfully prepared by the PMQ (plasma arc melting and rapid quenching) method. The formation of a Yb_2BaCuO_5 single phase was identified by means of X-ray diffraction analysis. The relative density was 98% of the theoretical density. Furthermore, the formation of superconducting YbBa_2Cu_3_O_x films on the insulating Yb_2BaCuO_5 substrate was attempted by RF magnetron sputtering. Superconducting YbBa_2Cu_3O_x films were grown with their c-axis preferentially perpendicular to the surface of the Yb_2BaCuO_5 substrate, and their T_c was observed at 88 K. The current density J_c of the YbBa_2Cu_3O_x films on the Yb_2BaCuO_5 substrate measured at 77 K under an absence of magnetic field was 1.2×10^5 A/cm^2.
社団法人日本セラミックス協会の論文
1992-10-01