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Title: Magnetic preferential orientation of metal oxide superconducting materials

Abstract

A superconductor comprised of a polycrystalline metal oxide such as YBa[sub 2]Cu[sub 3]O[sub 7[minus]X] (where 0 < X < 0.5) exhibits superconducting properties and is capable of conducting very large current densities. By aligning the two-dimensional Cu-O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the conduction of high current densities. The highly anisotropic diamagnetic susceptibility of the polycrystalline metal oxide material permits the use of an applied magnetic field to orient the individual crystals when in the superconducting state to substantially increase current transport between adjacent grains. In another embodiment, the anisotropic paramagnetic susceptibility of rare-earth ions substituted into the oxide material is made use of as an applied magnetic field orients the particles in a preferential direction. This latter operation can be performed with the material in the normal (non-superconducting) state. 4 figs.

Inventors:
; ;
Issue Date:
OSTI Identifier:
7268325
Patent Number(s):
4942151 A
Application Number:
PPN: US 7-101820
Assignee:
Arch Development Corp., Argonne, IL (United States) PTO; EDB-94-116665
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 28 Sep 1987
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM OXIDES; CURRENT DENSITY; GRAIN ORIENTATION; SUPERCONDUCTIVITY; COPPER OXIDES; YTTRIUM OXIDES; HIGH-TC SUPERCONDUCTORS; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; MAGNETIC PROPERTIES; MICROSTRUCTURE; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties; 360207 - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Capone, D.W., Dunlap, B.D., and Veal, B.W. Magnetic preferential orientation of metal oxide superconducting materials. United States: N. p., 1990. Web.
Capone, D.W., Dunlap, B.D., & Veal, B.W. Magnetic preferential orientation of metal oxide superconducting materials. United States.
Capone, D.W., Dunlap, B.D., and Veal, B.W. Tue . "Magnetic preferential orientation of metal oxide superconducting materials". United States.
@article{osti_7268325,
title = {Magnetic preferential orientation of metal oxide superconducting materials},
author = {Capone, D.W. and Dunlap, B.D. and Veal, B.W.},
abstractNote = {A superconductor comprised of a polycrystalline metal oxide such as YBa[sub 2]Cu[sub 3]O[sub 7[minus]X] (where 0 < X < 0.5) exhibits superconducting properties and is capable of conducting very large current densities. By aligning the two-dimensional Cu-O layers which carry the current in the superconducting state in the a- and b-directions, i.e., within the basal plane, a high degree of crystalline axes alignment is provided between adjacent grains permitting the conduction of high current densities. The highly anisotropic diamagnetic susceptibility of the polycrystalline metal oxide material permits the use of an applied magnetic field to orient the individual crystals when in the superconducting state to substantially increase current transport between adjacent grains. In another embodiment, the anisotropic paramagnetic susceptibility of rare-earth ions substituted into the oxide material is made use of as an applied magnetic field orients the particles in a preferential direction. This latter operation can be performed with the material in the normal (non-superconducting) state. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {7}
}