Method of reducing critical current density of oxide superconduc

Details Method of reducing critical current density of oxide superconduc Method of reducing critical current density of oxide superconduc

1988-03-29

1991-10-01

Morgenstern, Norman

Superconductor technology: apparatus, material, process

High temperature , per se

Having tc greater than or equal to 150 k

505702, 505701, 505730, 427 62, 427 38, 427 431, 357 5, 2504923, B05D 512, B05D 306

Patent

active

050533835

ABSTRACT:
The critical current density J.sub.c of a superconductive oxide film can be tailored, without substantial change in the critical temperature T.sub.c (R.dbd.0), by introduction of radiation damage into the superconductor. Exemplarily, this is done by exposure to energetic (e.g., 1 MeV) ions. The ability to tailor J.sub.c permits optimization of SQUIDS and other thin film devices, and makes it possible to produce superconductive interconnects that comprise "fuses" or current limiters.

REFERENCES:
Mankiewich et al., "Reproducible Technique for Fabrication of Thin Films of High Transition Temperature Superconductors", Appl. Phys. Lett. 51 (21) Nov. 1987, pp. 1753-1755.
"Effect of Ion Bombardment on the Critical Current of YBa.sub.2 Cu.sub.3 O.sub.7 Films", by S. V. Antonenko et al., JETP Lett., vol. 47, No. 5, Mar. 10, 1988, pp. 314-317.
Physica, vol. 126, (1984) 275-279, "Superconductivity in Ba (Pb, Bi)O.sub.3 ".
Zeitschr. f. Physik B-Condensed Matter, vol. 64, pp. 189-193 (1986) "Possible High T.sub.c Superconductivity in the Ba-La-Cu-O System" by J. G. Bednorz et al.
Physical Review Letters, vol. 58, No. 9, Mar. 2, 1987, pp. 908-910, "Superconductivity at 93K in a New Mixed-Phase Y--Ba--Cu--O Compound System at Ambient Pressure" by M. K. Wu et al.
Physical Review Letters, vol. 58, No. 9, Mar. 2, 1987, pp. 911-912, "High Pressure Study of the New Y--Ba--Cu--O Superconducting Compound System" by P. H. Hor et al.
Physical Review Letters, vol. 58, No. 16, Apr. 20, 1987, pp. 1676-1679, "Bulk Superconductivity at 91K in Single-Phase Oxygen-Deficient Perovskite Ba.sub.2 YCu.sub.3 O.sub.9-.delta. " R. J. Cava et al.
Superconductor Applications: SQUIDS and Machines, Plenum Press 1977 by B. B. Schwartz et al.
Physical Review B, vol. 35 (16) pp. 8821-8823 (1987) "Thin Superconducting Oxide Films" by R. B. Laibowitz et al.
Applied Physics Letters 51 (2), Jul. 20, 1987, "Quantum Interference Devices Made from Superconducting Oxide Thin Films", pp. 200-202, by R. H. Koch et al.
Applied Physics Letters 51 (2), Jul. 13, 1987, pp. 139-141, "Effects of Radiation Damage in Ion-Implanted Thin Films of Metal Oxide Superconductors" by G. J. Clark et al.

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