Title :
Development of 3 terminal devices based on asymmetric, long, YBCO Josephson junctions
Author :
Isaac, S.P. ; Tarte, E.J. ; Baudenbacher, F.J. ; Blamire, M.G.
Author_Institution :
Interdisciplinary Res. Centre in Superconductivity, Cambridge Univ., UK
fDate :
6/1/1997 12:00:00 AM
Abstract :
The critical current of long, asymmetric Josephson junctions, I/sub c/, is highly dependent on the applied magnetic field and the geometry. Nearby currents are able to significantly modulate I/sub c/, leading to many possible devices. We have fabricated asymmetric long junctions (1-32 /spl mu/m) in YBCO thin films deposited on SrTiO/sub 3/ bicrystals that show improved sensitivity to control fields compared with symmetrically biased structures. The effect of the size and shape of the structures has been investigated in order to optimise the gain and critical current. We have compared our results to simulations.
Keywords :
Josephson effect; barium compounds; critical current density (superconductivity); electron device manufacture; magnetic field effects; superconducting device testing; superconducting thin films; superconducting transistors; yttrium compounds; 1 to 32 micron; SrTiO/sub 3/; YBaCuO-SrTiO/sub 3/; applied magnetic field; asymmetric long Josephson junctions; control fields; critical current; gain; shape; superconducting thin films; symmetrically biased structures; three-terminal devices; Critical current; Electrodes; Geometry; Grain boundaries; Josephson junctions; Magnetic fields; Magnetic films; Superconducting films; Superconducting magnets; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
