Ceramics-Silikáty 49, (1) 19 - 22 (2005) |
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YBa₂Cu₃O₇-x MELT-TEXTURED THICK FILMS DEPOSITED ON ALUMINA-TOUGHENED ZIRCONIA SUBSTRATE
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Plesch Gustav 1, Kliment Juraj 1, Billik Peter 1,
Cigáň Alexander 2,
Maňka Ján 2,
Plewa Julian 3,
Altenburg Horst 3
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1 Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, 842 15 Bratislava, Slovakia
2 Institute of Measurement Science, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia
3 FH Münster / University of Applied Sciences, Lab. Supraleitung, Keramik, Kristalle,
SIMa, Steinfurter Initiative für Materialforschung, Steinfurt, Germany
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Keywords: YBa₂Cu₃O₇ (YBCO), Thick films, Melt textured, Alumina toughened YSZ substrate
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Melt textured superconducting YBCO films with an approximate thickness of 50-120 µm and Tc(0) values ranging between 86.5
and 88.5 K have been prepared on polycrystalline yttria-stabilized zirconia substrate, toughened by 20 wt.% Al₂O₃. Between
the substrate and superconducting film an interface layer was formed. Their AC and DC magnetization characteristics were
measured and the values of the magnetic penetration field Hp1 were estimated. The penetration field Hp1 of 2.7 kA m⁻¹ was
obtained for the thinner film deposited with a higher spin coating rate, while for the thicker film deposited with a lower spin
coating rate Hp1 = 4.4 kA m⁻¹. Repeated temperature cycling between room and liquid nitrogen temperatures and corresponding
measurement of the magnetization hysteresis curves reveal the significant decrease of the grain superconducting properties
caused probably by arising cracks. |
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