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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]
  1. Downers Grove, IL
  2. Hinsdale, IL
  3. West Lafayette, IN
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
872142
Patent Number(s):
US 5869431
Assignee:
University of Chicago (Chicago, IL)
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.
Veal, Boyd W, Paulikas, Arvydas, Balachandran, Uthamalingam, & Zhong, Wei. Thin film seeds for melt processing textured superconductors for practical applications. United States.
Veal, Boyd W, Paulikas, Arvydas, Balachandran, Uthamalingam, and Zhong, Wei. 1999. "Thin film seeds for melt processing textured superconductors for practical applications". United States. https://www.osti.gov/servlets/purl/872142.
@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 = {},
url = {https://www.osti.gov/biblio/872142}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

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