Fabrication and superconducting properties of ternary REBa2Cu3Oy thin films

Thin films of ternary REBa2Cu3Oy (RE=Y0.33R0.33Nd0.33, R=Ho, Gd, and Eu) were grown by PLD technique. The films showed an onset of Tc around 90 K and a sharp transition with a width of 1.5 K. Microstructural investigations using AFM revealed that the morphology of grain growth is mainly controlled b...

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Published in:Physica. C, Superconductivity Superconductivity, 2002-01, Vol.366 (2), p.123-128
Main Authors: Reddy, E.Sudhakar, Patanjali, P.V., Sampathkumaran, E.V., Pinto, R.
Format: Article
Language:English
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Summary:Thin films of ternary REBa2Cu3Oy (RE=Y0.33R0.33Nd0.33, R=Ho, Gd, and Eu) were grown by PLD technique. The films showed an onset of Tc around 90 K and a sharp transition with a width of 1.5 K. Microstructural investigations using AFM revealed that the morphology of grain growth is mainly controlled by step growth mechanism. The individual grains merge to form elongated grains. XRD pattern showed the grains to be oriented along c-axis. Magnetization measurements using SQUID magnetometer displayed highest Jc, 3.5x107 A/cm2 at 77 K, 0 T field in (Y0.33Ho0.33Nd0.33)Ba2Cu3Oy films, where the difference in ionic radii between the RE atoms is maximum. 14 refs.
ISSN:0921-4534
DOI:10.1016/S0921-4534(01)00883-8