Lattice Parameters and Surface Morphology of the High-<I>T</I><SUB>c</SUB> Phase in Bi–Sr–Ca–Cu–O Superconducting Thin Films
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Bi–Sr–Ca–Cu–O thin films with different <I>T</I><SUB>c</SUB> values in the range from 110 K to 84 K were prepared on MgO(100) crystal by an rf-magnetron sputtering technology. The volume ratio of the high-<I>T</I><SUB>c</SUB> phase, its lattice parameters and the surface morphology for these films were investigated. <I>T</I><SUB>c</SUB> became higher as the <I>c</I>- and <I>a</I>-axes became shorter. The lattice parameters of the film with <I>T</I><SUB>c</SUB>=110 K were <I>c</I>=37.15 Å and <I>a</I>=5.41 Å, which were the same as for bulk ceramics with <I>T</I><SUB>c</SUB>=110 K. The grain size was larger for the higher-<I>T</I><SUB>c</SUB> films.
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公益社団法人 応用物理学会 | 論文
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