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:
-
- Los Alamos, NM
- Bartlett, TN
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 867130
- Patent Number(s):
- 4873444
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
- 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 = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}
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