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A method is demonstrated where by the characteristic impedance of transmission lines may be easily determined from a measurement of the propagation constant. The method is based on a rigorous analysis using realistic approximations to account for the
Stephen E. Russek, Brian H. Moeckly, D. K. Lathrop, M. G. Norton, C, B. Carter
We have investigated the nature of the in-situ growth of c-axis normal TBa2Cu3O7 thin films on non-lattice-matched, vicinal, and polycrystalline MgO substrates, and on buffer layers of MgO. We find that the preparation of the MgO surface determines the
Ronald H. Ono, Loren F. Goodrich, James A. Beall, Marcus Johansson, Carl D. Reintsema
We have measured the transport critical current density (Jc) in epitaxial quality films of YBa2Cu307-delta some of which were covered by thin (10 nm) Ag films. The films, both with and without Ag, had J, values greater than IO^6 A/cm^2 in liquid nitrogen