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    Thermal stability and annealing of columnar defects in Bi₂Sr₂Ca₁Cu₂O₈/Ag superconductor

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    1995-02-95_APL_1.pdf (172.9Kb)
    Date
    1995-08-14
    Author
    Thompson, J. R.
    Paul, David
    Wang, Z. L. (Zhong Lin)
    Kroeger, D. M.
    Christen, D. K.
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    Abstract
    This work establishes the stability at elevated temperatures of columnar defects, artificially formed in the Bi-based cupric oxide superconductor Bi₂Sr₂Ca₁Cu₂O₈ for enhanced vortex pinning. Isochronal anneals, conducted in air, led to losses of critical current density in two stages. The defects were relatively stable up to ~ 550 °C, where second stage annealing began; above this, the pinning diminished rapidly. The recrystallization and loss of columnar defects were corroborated by transmission electron microscopy.
    URI
    http://hdl.handle.net/1853/27094
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    • Center for Nanoscience and Nanotechnology Publications [105]

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