Superconducting Thin Films for Cellular Applications

9402117 埃迪，迈克尔 在少量衬底上成功地制备了TlBaCaCuO（TBCCO）和YBa_2Cu_3O_（7 -8）（YBCO）外延薄膜。 目前，LaAlO 3是惰性的，使衬底和超导体之间的相互扩散最小化，并且与HTS结构具有良好的晶格匹配。 然而，它的大规模使用存在局限性。 两个最重要的问题是高介电常数（23.5）和孪晶。 最有前途的近期替代基板，没有这些问题是MgO，然而，高品质的TBCCO薄膜在此基板上的生长是困难的。 此外，对于YBCO，超导体的质量相对于LaAlO 3上的YBCO降低。 由于MgO和超导体之间的热膨胀匹配，MgO将被用作第二阶段的衬底。

9402117 Eddy, Michael The preparation of epitaxial TlBaCaCuO (TBCCO) and YBa2Cu3O7-8 (YBCO) films has been demonstrated on a small number of substrates. At present, LaAlO3 is inert, minimizing interdiffusion between the substrate and superconductor and has a good lattice match to the HTS structure. However, there are limitations to its wide-scale use. The two most significant problems are the high dielectric constant (23.5) and twinning. The most promising near-term alternative substrate which does not have these problems is MgO; however, growth of high quality TBCCO films on this substrate is difficult. In addition, for YBCO, the quality of the superconductor is degraded relative to YBCO on LaAlO3. MgO will be used as the substrate in Phase II because of the thermal expansion match between MgO and the superconductor.