Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1988-11-22
1991-05-14
Morgenstern, Norman
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505706, 505742, 427 62, 427125, 20419217, 2041923, 20419232, B05D 512, C23C 1434, C23C 1458
Patent
active
050156209
ABSTRACT:
A high-T.sub.c superconductor contact unit having low interface resistivity is disclosed, as is a method for making the unit. An inert metal is deposited on the surface of the superconductor, which surface is preferably non-degraded, to form a unit with the surface of the superconductor, and where temperatures as high as 500.degree. C. to 700.degree. C. can be tolerated, the unit is oxygen annealed to establish a still lower surface resistivity between the surface of the high-T.sub.c superconductor and the inert metal, including a low surface resistivity of about 10.sup.-10 .OMEGA.-cm.sup.2 at high-T.sub.c superconductor operating temperatures. The superconductor is a metal-oxide superconductor, and may be rare earth, thallium, or bismuth based.
REFERENCES:
Tzeng et al., Appl. Phys. Lett., 52 (2), Jan. 11, 1988.
Sugimoto et al., Jap. J. of Appl. Phys., vol. 27, No. 5, May 1988.
Vander Maas et al., Nature, vol. 328, Aug. 13, 1987.
Ginley et al., MRS Conf. on High Tc Superconductors, Apr. 23-24, 1987, pp. 01-204.
Schiller et al., Thin Solid Films, 72 (1980) 313-326.
Applied Physics Letters, vol. 51, No. 11, Sep. 14, 1987, pp. 861-863, Ameridan Institute of Physics, New York, U.S.
X. D. Wu et al.: "Epitaxaial ordering of oxide superconductor thin films on (100)SrTiO3 prepared by pulsed laser evaporation".
Advanced Ceramic Materials--Ceramic Superconductors, vol. 2, No. 3B, Jul. 1987, pp. 388-400, ACerS, Westerville, OH, U.S.
R. W. McCallum et al.: "Problems in the production of YBa2Cu3Ox superconducting wire".
Blankenship Betty A.
Ekin John W.
Panson Armand J.
Bueker Margaret
Englert Alvin J.
Harris Robert E.
Morgenstern Norman
The United States of America as represented by the Secretary of
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