Comparison of crystalline and superconducting properties of sputtered a-axis oriented YBCO films on MgO and SrTiO3 substrates
作者： S. Mahajan , J.G. Wen , W. Ito , C.H. Cho , T. Takenaka
DOI: 10.1016/0921-4534(94)90734-X
关键词: Sheet resistance 、 Thin film 、 Superconductivity 、 Crystallography 、 Deposition (law) 、 Microstructure 、 Materials science 、 Layer (electronics) 、 Surface conductivity 、 Crystallinity
摘要: Abstract The crystalline and superconducting properties of sputtered a -axis oriented thin films Y 1 Ba 2 Cu 3 O 7− x on SrTiO (100) MgO substrates are compared using X-ray diffraction (XRD), high-resolution electron microscopy (HREM), atomic force microscopy, critical current ( J c ) surface resistance R s measurements. A two step self-template method was used for deposition, HREM measurements revealed that the bulk film beyond template pure also lattice-mismatched MgO. However, nature layer completely different crystallinity found to be dependent template. indicated owing its poor crystallinity, were dominated by weak links in contrast well-coupled grains .
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sci-hub.se 参考文章(6)
A. Inam, C. T. Rogers, R. Ramesh, K. Remschnig, L. Farrow, D. Hart, T. Venkatesan, B. Wilkens, a‐axis oriented epitaxial YBa2Cu3O7−x‐PrBa2Cu3O7−yheterostructures Applied Physics Letters. ,vol. 57, pp. 2484- 2486 ,(1990) , 10.1063/1.104179
J.F. Hamet, B. Mercey, M. Hervieu, B. Raveau, a-Axis oriented YBa2Cu3O7 superconducting thin film grown on MgO substrate Physica C-superconductivity and Its Applications. ,vol. 193, pp. 465- 470 ,(1992) , 10.1016/0921-4534(92)90972-F
N. Klein, G. Müller, H. Piel, B. Roas, L. Schultz, U. Klein, M. Peiniger, Millimeter wave surface resistance of epitaxially grown YBa2Cu3O7−xthin films Applied Physics Letters. ,vol. 54, pp. 757- 759 ,(1989) , 10.1063/1.101472
J. Halbritter, On extrinsic effects in the surface impedance of cuprate superconductors by weak links Journal of Applied Physics. ,vol. 71, pp. 339- 343 ,(1992) , 10.1063/1.350711
S. Mahajan, W. Ito, Y. Yoshida, T. Morishita, Effects of target and template layer on the properties of highly crystalline superconducting a-axis films of Y1Ba2Cu3O7−x by DC-sputtering Physica C-superconductivity and Its Applications. ,vol. 213, pp. 445- 454 ,(1993) , 10.1016/0921-4534(93)90465-3
O. Nakamura, J. Guimpel, F. Sharifi, R. C. Dynes, Ivan K. Schuller, Synthesis and properties of a‐axis and b‐axis oriented GdBa2Cu3O7−δ high Tc thin films Applied Physics Letters. ,vol. 61, pp. 2598- 2600 ,(1992) , 10.1063/1.108139