- 期刊
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Structure and Superconducting Properties in NbN this Films and Single Crystal Oxide Superconductors
並列摘要
While the stable, high performance superconducting properties displayed by sputtered NbN thin fiis have made it a material of technological interest, the critical field anisotropy commonly observed in this material has been a puzzling effect for some time. Systematic studies of the detailed angular dependence of the upper critical field on films with distinct microstructures have disclosed the origin of the observed critical field anisotropy. Detailed analysis within the framework of the Ginzburg-Landau phenomenological theory will be presented. In contrast to the sputtered NbN thin films, the anisotropic nature displayed by the newly discovered high-Tc oxide superconductors is far more pronounced and is believed to be intrinsic to the layered crystal structure. Experimental results on the effects of the critical field anisotropy in M-substituted YBCO single crystals as well as the unusual field orientation dependent current-voltage characteristics in BSCCO (2212) single crystals will be presented.
並列關鍵字
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