Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – Superconductor next to superconductor
Patent
1996-04-15
1999-02-09
King, Roy V.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
Superconductor next to superconductor
505126, 505450, 505451, 505733, 505780, 427 62, H01L 3900
Patent
active
058694315
ABSTRACT:
A method of fabricating bulk superconducting material such as RBa.sub.2 Cu.sub.3 O.sub.7-.delta. where R is La or Y comprising depositing a thin epitaxially oriented film of Nd or Sm (123) on an oxide substrate. The powder oxides of RBa.sub.2 Cu.sub.3 O.sub.7-.delta. or oxides and/or carbonates of R and Ba and Cu present in mole ratios to form RBa.sub.2 Cu.sub.3 O.sub.7-.delta., where R is Y or La are heated, in physical contact with the thin film of Nd or Sm (123) on the oxide substrate to a temperature sufficient to form a liquid phase in the oxide or carbonate mixture while maintaining the thin film solid to grow a large single domain 123 superconducting material. Then the material is cooled. The thin film is between 200 .ANG. and 2000 .ANG.. A construction prepared by the method is also disclosed.
REFERENCES:
patent: 5308799 (1994-05-01), Morita et al.
Todt, Journal of Electronic Materials, vol. 23, No. 11, 1994, pp. 1127-1130.
Badaye et al, Appl. Phys. Lett. 66(16) Apr. 1995, pp. 2131-2133.
Balachandran Uthamalingam
Paulikas Arvydas
Veal Boyd W.
Zhong Wei
King Roy V.
The University of Chicago
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