Y-Ba-Cu-O/Au/Nb ramp-type Josephson junctions
نویسندگان
چکیده
منابع مشابه
Y - Ba - Cu - 0 / Au / Nb Ramp - type Josephson Junctions
Ramp-type junctions connecting the d-wave superconductor YBazCu307.s and the s-wave superconductor niobium are fabricated using a thin gold layer as a chemical barrier. High critical current densities exceeding 5 kA/cm2 are obtained. The normal state resistivity (R,& values of the junctions are of the order of 0.1 pQ cm'. The magnetic field behavior of the critical current of junctions oriented...
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We report our studies on single-picosecond electrical pulse switching of YBa2Cu3O7−x (YBCO) grain-boundary bicrystal Josephson junctions. The test structures consisted of coplanar strip (CPS) transmission lines that were patterned in 50 nm thick YBCO films prepared on (100) MgO bicrystal substrates. Each CPS contained a 5 μm wide, 10 μm long microbridge and a 5 μm wide grain-boundary Josephson ...
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We report our time-resolved measurements of switching dynamics of grain-boundary, 5-mm-wide Y–Ba–Cu–O ~YBCO! Josephson junctions, excited by 2-ps-wide electrical pulses optically generated by a voltage-biased, 5-mm-wide, 10-mm-long YBCO microbridge. The time-resolved transients were recorded at 20 K using a subpicosecond cryogenic electro-optic sampling system. The intrinsic junction response w...
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The dependence of the ramp geometry on highor low-angle ion-beam etching, used to structure ramp-type Josephson junctions based on ReBa2Cu3O7−δ high-Tc superconductors, is investigated by cross-section transmission electron microscopy. The surface quality, interfaces and crystal defects are analysed by high-resolution electron microscopy. Technical difficulties to reproducibly obtain the desire...
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ژورنال
عنوان ژورنال: IEEE Transactions on Appiled Superconductivity
سال: 2001
ISSN: 1051-8223
DOI: 10.1109/77.919392