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Investigation of step-edge Josephson device of YBaCu O formed on MgO by a pulsed laser deposition method

Czechoslovak Journal of Physics, ISSN: 0011-4626, Vol: 54, Issue: 12, Page: 1521-1525
2004
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We fabricated step-edge Josephson junctions of YBaCu O on MgO substrates by a pulsed laser deposition method for high frequency applications. On the basis of temperature dependence of critical current, noticeable deterioration has not been observed in a step-edge area. The dynamic resistance was between 2 and 3 Ω under the superconducting critical temperature. A deviation from a resistively shunted junction model was observed, which implies the excess current not flowing through Josephson junctions.

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