Magnetic preferential orientation of metal oxide superconducting materials

Capone, Donald W; Dunlap, Bobby D; Veal, Boyd W

Title: Magnetic preferential orientation of metal oxide superconducting materials

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Abstract

A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0<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.

Inventors:

Capone, Donald W ^[1]; Dunlap, Bobby D ^[1]; Veal, Boyd W ^[2]

Bolingbrook, IL
Downers Grove, IL

Issue Date:: 1990-01-01

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

OSTI Identifier:: 867458

Patent Number(s):: 4942151

Assignee:: Arch Development Corporation (Argonne, IL)

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

C - CHEMISTRY C30 - CRYSTAL GROWTH C30B - SINGLE-CRYSTAL-GROWTH

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
H01L39/2419 - {the superconducting material comprising copper oxide}

C - CHEMISTRY C30 - CRYSTAL GROWTH C30B - SINGLE-CRYSTAL-GROWTH
C30B29/22 - Complex oxides

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
H01L39/143 - {comprising high Tc ceramic materials}

C - CHEMISTRY C30 - CRYSTAL GROWTH C30B - SINGLE-CRYSTAL-GROWTH
C30B29/605 - {Products containing multiple oriented crystallites, e.g. columnar crystallites}
C30B1/12 - by pressure treatment during the growth
C30B29/225 - {based on rare earth copper oxides, e.g. high T-superconductors}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S505/741 - Coating or casting onto a substrate, e.g. screen printing, tape casting

C - CHEMISTRY C30 - CRYSTAL GROWTH C30B - SINGLE-CRYSTAL-GROWTH
C30B33/00 - After-treatment of single crystals or homogeneous polycrystalline material with defined structure

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DOE Contract Number:: W-31109-ENG-38

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: magnetic; preferential; orientation; metal; oxide; superconducting; materials; superconductor; comprised; polycrystalline; yba; cu; 7-x; exhibits; properties; capable; conducting; current; densities; aligning; two-dimensional; cu-o; layers; carry; a-; b-directions; basal; plane; degree; crystalline; axes; alignment; provided; adjacent; grains; permitting; conduction; highly; anisotropic; diamagnetic; susceptibility; material; permits; applied; field; orient; individual; crystals; substantially; increase; transport; embodiment; paramagnetic; rare-earth; substituted; orients; particles; direction; latter; operation; performed; normal; non-superconducting; polycrystalline metal; adjacent grains; preferential orientation; superconducting properties; current densities; conducting material; oxide superconducting; magnetic field; metal oxide; superconducting material; oxide material; superconducting materials; applied magnetic; two-dimensional cu-o; substantially increase; crystalline axes; grains permitting; basal plane; axes alignment; paramagnetic susceptibility; exhibits superconducting; cu-o layers; superconductor comprised; increase current; /505/264/

Citation Formats


                    Capone, Donald W, Dunlap, Bobby D, and Veal, Boyd W. Magnetic preferential orientation of metal oxide superconducting materials.  United States: N. p., 1990. 
        Web.

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                    Capone, Donald W, Dunlap, Bobby D, & Veal, Boyd W. Magnetic preferential orientation of metal oxide superconducting materials.  United States.

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                    Capone, Donald W, Dunlap, Bobby D, and Veal, Boyd W. Mon .  
        "Magnetic preferential orientation of metal oxide superconducting materials".  United States.  https://www.osti.gov/servlets/purl/867458.

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@article{osti_867458,

  title        = {Magnetic preferential orientation of metal oxide superconducting materials},

  author       = {Capone, Donald W and Dunlap, Bobby D and Veal, Boyd W},

  abstractNote = {A superconductor comprised of a polycrystalline metal oxide such as YBa.sub.2 Cu.sub.3 O.sub.7-X (where 0<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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1990},

  month        = {1}

}

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