Title :
Proximity effect in edge type junctions with PrBa/sub 2/Cu/sub 3/O/sub 7/ barriers prepared by Br-ethanol etching
Author :
Faley, M.I. ; Poppe, U. ; Jia, C.L. ; Urban, K. ; Xu, Y.
Author_Institution :
Inst. fur Festkorperforschung, Julich, Germany
fDate :
6/1/1995 12:00:00 AM
Abstract :
Multilayer Josephson edge type junctions were prepared on the edges of c-axis oriented YBa/sub 2/Cu/sub 3/O/sub 7/ thin films structured by chemical etching in a Br-ethanol solution. Resistive PrBa/sub 2/Cu/sub 3-x/Ga/sub x/O/sub 7/ (x=0, 0.15, and 0.3) films were deposited by the high oxygen pressure dc-sputtering technique and used for barrier and insulation layers. Basic properties of the junctions such as I/sub c/(T), I/sub c/(d), R/sub n/(T), and basic characteristics of the proximity effect such as /spl xi//sub n/, /spl gamma/ and /spl gamma//sub B/ were obtained and discussed.<>
Keywords :
Josephson effect; barium compounds; etching; high-temperature superconductors; praseodymium compounds; proximity effect (superconductivity); sputtered coatings; superconducting thin films; yttrium compounds; Br; Br-ethanol solution; YBa/sub 2/Cu/sub 3/O/sub 7/ thin films; YBa/sub 2/Cu/sub 3/O/sub 7/-PrBa/sub 2/(CuGa)/sub 3/O/sub 7/-YBa/sub 2/Cu/sub 3/O/sub 7/; barrier layers; chemical etching; critical current; high oxygen pressure DC-sputtering; insulation layers; multilayer Josephson edge type junctions; normal resistance; proximity effect; resistive PrBa/sub 2/Cu/sub 3-x/Ga/sub x/O/sub 7/ films; Electrodes; Etching; High temperature superconductors; Josephson junctions; Nonhomogeneous media; Plasma temperature; Proximity effect; Superconducting devices; Superconducting epitaxial layers; Superconducting films;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
