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Critical current and microstructure in oxide superconductors

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Abstract

Critical current density (Jc) in the presence of a magnetic field is the property that currently limits many applications of the high-critical-temperature oxide superconductors. Poor current transmission at grain boundaries and weak flux pinning are responsible for the low critical current densities observed in bulk materials. Since 1986, substantial progress has been made both in understanding the microstructural factors affecting Jc and in developing practical fabrication methods. Much of the fundamental understanding has been obtained from studies of YBa2Cu3O7−x while the bismuth and thallium-based compounds appear to offer greater potential as the basis for the first practical conductors.

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Authors and Affiliations

  1. Oak Ridge National Laboratory, USA

    D. M. Kroeger Ph.D. (group leader of the superconducting materials group, member of TMS) & A. Goyal Ph.D. (superconducting materials group, member of TMS)

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  1. D. M. Kroeger Ph.D.
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  2. A. Goyal Ph.D.
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Kroeger, D.M., Goyal, A. Critical current and microstructure in oxide superconductors. JOM 44, 42–47 (1992). https://doi.org/10.1007/BF03223171

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