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  • 1
    Electronic Resource
    Electronic Resource
    Study of interaction between ZrO2 (YSZ) substrates and YBa2Cu3O7−δ superconducting films (1989)
    Springer
    Applied physics 48 (1989), S. 277-281 
    Details
    ISSN: 1432-0630
    Keywords: 66.30.−h ; 68.20.+t ; 68.48.+f ; 74.70.Rv
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The interactions between YBa2Cu3O7−δ superconducting films and ZrO2 substrates with different crystal orientations were investigated. Our results show that the crystal orientation of the substrate influences the orientations of the YBa2Cu3O7−δ crystals, whose c-axis have preferential orientations parallel to the surface of 〈100〉 ZrO2 substrates. The copper segregation in Y-Ba-Cu-O/〈ZrO2〉 films results from substrate reactions. Y, Ba, and Cu atoms diffusing into substrates were detected by AES and RBS techniques. A thin silver film evaporated on ZrO2 substrate as a buffer layer effectively slows down or eliminates the substrate interactions. The strong preferential c-axis orientation perpendicular to the substrate surface has been observed in the YBa2Cu3O7−δ /Ag/〈ZrO2〉 samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619398
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Epitaxial growth of YBa2Cu3O7−δ superconducting thin films by DC magnetron sputtering using a partially melted sintered target (1992)
    Springer
    Applied physics 54 (1992), S. 303-307 
    Details
    ISSN: 1432-0630
    Keywords: 74.75+t ; 81.15 Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In situ epitaxially grown YBa2Cu3O7−δ (YBCO) thin films on (100)SrTiO3 substrates with high critical current J c=3.4 × 106 A/cm2 (at 77 K) and low microwave surface resistance R s≤37 mω (at 77 K, 50.9 GHz) are fabricated by dc magnetron sputtering using a large partially melted sintered planar target. A comparatively large homogeneous composition region can be obtained. The X-ray diffraction, X-ray double crystal diffraction, and high resolution transmission electron microscopy (HRTEM) analyses show that our deposited YBCO thin films are single crystalline containing mosaic blocks. The influence of substrate quality on the orientation behaviour of the films is also discussed. A method to improve the surface quality of the SrTiO3 substrate, which improves the properties of the thin film, is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323855
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    Paper (German National Licenses)
    Fulltext
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