Title :
Heterostructure applications of in-plane oriented a-axis YBa/sub 2/Cu/sub 3/O/sub 7-x/ films on LaSrGaO/sub 4/
Author :
Takeuchi, I. ; Trajanovic, Z. ; Peng, J.L. ; Li, Z.Y. ; Mao, S.N. ; Warburton, P.A. ; Lobb, C.J. ; Venkatesan, T.
Author_Institution :
Dept. of Phys., Maryland Univ., College Park, MD, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have fabricated various heterostructures using in-plane oriented a-axis YBa/sub 2/Cu/sub 3/O/sub 7/(-x) and PrBa/sub 2/Cu/sub 3/O/sub 7/(-x) on LaSrGaO/sub 4/ substrates. Superconductor-insulator-superconductor multilayers were fabricated with LaSrGaO/sub 4/ and Nd/sub 2/CuO/sub 4/ as dielectric layers. For such structures with approximately 3000 /spl Aring/ of Nd/sub 2/CuO/sub 4/, both top and bottom layers had T/sub c/ (R=0)/spl ges/85 K. YBa/sub 2/Cu/sub 3/O/sub 7-x//PrBa/sub 2/Cu/sub 3/O/sub 7-x//YBa/sub 2/Cu/sub 3/O/sub 7-x/ ramp-edge junctions were fabricated in the b-direction of the a-axis fame, and an I/sub c/R product of 1 mV was obtained at 4.2 K.<>
Keywords :
Josephson effect; barium compounds; high-temperature superconductors; pulsed laser deposition; superconducting thin films; superconducting transition temperature; superconductor-insulator-superconductor devices; yttrium compounds; 4.2 K; 85 K; I/sub c/R product; LaSrGaO/sub 4/; LaSrGaO/sub 4/ substrates; Nd/sub 2/CuO/sub 4/; PrBa/sub 2/Cu/sub 3/O/sub 7-x/; PrBa/sub 2/Cu/sub 3/O/sub 7/; YBa/sub 2/Cu/sub 3/O/sub 7-x/ films; YBa/sub 2/Cu/sub 3/O/sub 7/; dielectric layers; heterostructures; in-plane oriented a-axis films; pulsed laser deposition; ramp-edge junctions; superconducting transitions; superconductor-insulator-superconductor multilayers; Geometry; Josephson junctions; Laser sintering; Lattices; Pulsed laser deposition; Substrates; Superconducting epitaxial layers; Superconducting films; Temperature; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
