Abstract

The thermal plasma processing to fabricate composite microstructures in films of oxide superconductors was developed. The aerosol obtained by the mist pyrolysis of multi-elemental solution was introduced to thermal plasma directly and decomposed to gas phase, followed by the rapid quenching and the segregation sequence onto MgO substrate. Addition of MgO and Ag to YBa2Cu3O7-y resulted in the enhancement of superconducting current property because of the eliminating weak-link at grain boundary and introducing of effective pinning centers.

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