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Title: Thin film seeds for melt processing textured superconductors for practical applications

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.

Inventors:
 [1];  [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Downers Grove, IL
  2. Hinsdale, IL
  3. West Lafayette, IN
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
OSTI Identifier:
872142
Patent Number(s):
5869431
Assignee:
University of Chicago (Chicago, IL)
Patent Classifications (CPCs):
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
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DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
film; seeds; melt; processing; textured; superconductors; practical; applications; method; fabricating; bulk; superconducting; material; rba; cu; 7-; delta; comprising; depositing; epitaxially; oriented; 123; oxide; substrate; powder; oxides; carbonates; mole; ratios; form; heated; physical; contact; temperature; sufficient; liquid; phase; carbonate; mixture; maintaining; solid; grow; single; domain; cooled; 200; ang; 2000; construction; prepared; disclosed; oxide substrate; comprising depositing; conducting material; liquid phase; temperature sufficient; superconducting material; film solid; mole ratio; physical contact; textured superconductor; single domain; carbonate mixture; powder oxides; mole ratios; melt processing; fabricating bulk; epitaxially oriented; bulk superconducting; practical applications; /505/427/

Citation Formats

Veal, Boyd W, Paulikas, Arvydas, Balachandran, Uthamalingam, and Zhong, Wei. Thin film seeds for melt processing textured superconductors for practical applications. United States: N. p., 1999. Web.
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Veal, Boyd W, Paulikas, Arvydas, Balachandran, Uthamalingam, & Zhong, Wei. Thin film seeds for melt processing textured superconductors for practical applications. United States.
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Veal, Boyd W, Paulikas, Arvydas, Balachandran, Uthamalingam, and Zhong, Wei. Fri . "Thin film seeds for melt processing textured superconductors for practical applications". United States. https://www.osti.gov/servlets/purl/872142.
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@article{osti_872142,
title = {Thin film seeds for melt processing textured superconductors for practical applications},
author = {Veal, Boyd W and Paulikas, Arvydas and Balachandran, Uthamalingam and Zhong, Wei},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}
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Works referenced in this record:

Processing of large YBa2 Cu3Ox domains for levitation applications by a Nd1+x Ba2−x Cu3 Oy-Seeded melt-growth technique
journal, November 1994

High‐quality c ‐axis oriented superconducting Nd 1+ x Ba 2− x Cu 3 O 7− d thin films deposited by the laser ablation method
journal, April 1995

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