Critical currents of laser-ablated epitaxial thin and ultrathin YBCO films

机译：激光烧蚀外延薄和超薄YBCO薄膜的临界电流

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The magnetic field dependence of critical currents in this and ultra-thin epitaxially grown films of YBCO grown on MgO and SrTiO_3 substrates been investigated by VSM measurements. It is shown that growth of YBCO on an epitaxial buffer layer of PrBCO with an amorphous capping layer of PrBCO greatly enhances the superconducting quality and stability of ultra-thin films. Measurements on relatively thick thin films (55-200nm) grown on MgO are compared with measurements on 2, 4 and 6-unit cell buffered and capped YBCO films. Measurements on the thicker films can be interpreted in terms of uniform superconducting properties across the whole area, whilst magnetic measurements on ultra-thin films imply the presence of weak-links leading to a model of weakly connected superconducting islands.

机译：通过VSM测量研究了在MgO和SrTiO_3衬底上生长的YBCO薄膜和超薄外延生长薄膜中临界电流的磁场依赖性。结果表明，在具有无定形的PrBCO覆盖层的PrBCO外延缓冲层上生长YBCO大大提高了超薄膜的超导质量和稳定性。将在MgO上生长的相对较厚的薄膜（55-200nm）的测量结果与在2、4和6单元电池缓冲并加盖的YBCO膜上的测量结果进行比较。可以用整个区域均匀的超导特性来解释对较厚膜的测量，而对超薄膜的磁测量表明存在弱连接，从而导致建立了弱连接的超导岛模型。

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来源
《8th International Workshop on Critical Currents in Superconductors Kitakyusbu, Japan 27-29 May 1996》|1996年|p.423-426|共4页
会议地点 Kitakyushu(JP)
作者
M.Sladki; P.Woodall; F.Wellhofer; M.Yeadon; C.E.Gough;
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3. Influence of MgO surface conditions on the in-plane crystal orientation and critical current density of epitaxial YBCO films [J] . Du J., Gnanarajan S., Bendavid A. Physica, C. Superconductivity and its applications . 2004,第3a4期

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4. Critical currents of laser-ablated epitaxial thin and ultrathin YBCO films [C] . M.Sladki, P.Woodall, F.Wellhofer, International workshop on critical currents in superconductors . 1996

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Critical currents of laser-ablated epitaxial thin and ultrathin YBCO films

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