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Highly Oriented Superconducting Bi ‐ Sr ‐ Ca ‐ Cu ‐ Oxide Thin Films by the Solution Sol ‐ Gel Process

  • P. Ravindranathan (a1), S. Komarneni (a1), A. S. Bhalla (a1) and R. Roy (a1)

Abstract

Highly oriented Bi2Sr2CaCu2O8+x films were prepared on MgO and SrTiO3 substrates by the solution sol ‐ gel (SSG) method. The tetra phasic sol containing bismuth, strontium, calcium and copper oxides was coated on the substrate by spin casting and calcined at 870*C for 10 minutes. X‐ ray diffraction patterns of the films showed the formation of the superconducting phase with preferential orientation along the C‐ axis. The microwave absorbtion data as a funtion of temperature revealed the onset temperature to be 90*K for the film coated on MgO substrate.

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