The preparation of superconducting epitaxial film using the method of liquid-phase epitaxial growth

摘要

Preparation of superconducting epitaxial film using the method of liquid phase epitaxial growth comprising the steps of:(1) melting the oxides of bismuth, calcium, strontium, and copper or the oxides of thallium, calcium, barium, and copper at temperature in the range of 900oC to 950oC to form a me(2) contacting the melt in (1) with magnesium oxide or mono crystalline materials;(3) lowering the temperature of the melt at a rate of 0.3-2oC/min until the temperature is within the range of 820oC to 890oC;(4) separating the melt and the magnesium oxide sub­strate or mono crystalline material to obtain a supercon­ducting epitaxial film; and(5) quenching said film in (4) until the temperature thereof is at room temperature, whereby a superconducting epitaxial film having a thickness of 40 to 150 µm is obtained.