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Title: Detection of surface impurity phases in high T.sub.C superconductors using thermally stimulated luminescence

Abstract

Detection of surface impurity phases in high-temperature superconducting materials. Thermally stimulated luminescence has been found to occur in insulating impurity phases which commonly exist in high-temperature superconducting materials. The present invention is sensitive to impurity phases occurring at a level of less than 1% with a probe depth of about 1 .mu.m which is the region of interest for many superconductivity applications. Spectroscopic and spatial resolution of the emitted light from a sample permits identification and location of the impurity species. Absence of luminescence, and thus of insulating phases, can be correlated with low values of rf surface resistance.

Inventors:
 [1];  [2]
  1. (Los Alamos, NM)
  2. (Bartlett, TN)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
867130
Patent Number(s):
4873444
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
detection; surface; impurity; phases; superconductors; thermally; stimulated; luminescence; high-temperature; superconducting; materials; found; occur; insulating; commonly; exist; sensitive; occurring; level; probe; depth; region; superconductivity; applications; spectroscopic; spatial; resolution; emitted; light; sample; permits; identification; location; species; absence; correlated; values; rf; resistance; surface resistance; conducting material; superconducting material; spatial resolution; temperature superconducting; superconducting materials; emitted light; thermally stimulated; superconductivity applications; high-temperature superconducting; impurity phases; stimulated luminescence; impurity species; surface impurity; /250/

Citation Formats

Cooke, D. Wayne, and Jahan, Muhammad S. Detection of surface impurity phases in high T.sub.C superconductors using thermally stimulated luminescence. United States: N. p., 1989. Web.
Cooke, D. Wayne, & Jahan, Muhammad S. Detection of surface impurity phases in high T.sub.C superconductors using thermally stimulated luminescence. United States.
Cooke, D. Wayne, and Jahan, Muhammad S. Sun . "Detection of surface impurity phases in high T.sub.C superconductors using thermally stimulated luminescence". United States. https://www.osti.gov/servlets/purl/867130.
@article{osti_867130,
title = {Detection of surface impurity phases in high T.sub.C superconductors using thermally stimulated luminescence},
author = {Cooke, D. Wayne and Jahan, Muhammad S.},
abstractNote = {Detection of surface impurity phases in high-temperature superconducting materials. Thermally stimulated luminescence has been found to occur in insulating impurity phases which commonly exist in high-temperature superconducting materials. The present invention is sensitive to impurity phases occurring at a level of less than 1% with a probe depth of about 1 .mu.m which is the region of interest for many superconductivity applications. Spectroscopic and spatial resolution of the emitted light from a sample permits identification and location of the impurity species. Absence of luminescence, and thus of insulating phases, can be correlated with low values of rf surface resistance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

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