有機又は無機酸塩熱分解法により作製したBa₂YCu₃O_x高温超伝導膜

抄録

Ba₂YCu₃O_x films were prepared from inorganic and organic acid salts to investigate the influences of starting materials on the superconducting transition. All films derived from acetates, nitrates and long-chain organic acid salts, as well as those from 2-ethylhexanoates reported previously, showed high T_c superconducting transition after heated at 800°C in pure oxygen atmosphere. The dependence of T_c values on the oxygen content required of the starting materials in pyrolysis shows that annealing depends on the starting materials. This is probably related to the concentration of the oxygen defects and/or the crystallization process of high-T_c phase.