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Title: Stability of Tl-Ba-Ca-Cu-O Superconducting Thin Films

Abstract

We report the stability of TlBa{sub 2}CaCu{sub 2}O{sub 7} (Tl-1212) and Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} (T1-2212) thin films and by inference, the stability of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9} (Tl-1223) and Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} (Tl-2223) thin films, under a variety of conditions. In general, we observe that the stability behavior of the single Tl-O layer materials (Tl-1212 and Tl-1223)are similar and the double Tl-O layer materials (Tl-2212 and Tl-2223) are similar. All films are stable with repeated thermal cycling to cryogenic temperatures. Films are also stable in acetone and methanol. Moisture degrades film quality rapidly, especially in the form of vapor. Tl-1212 is more sensitive to vapor than Tl-2212. These materials are stable to high temperatures in either N{sub 2}, similar to vacuum for the cuprates, and O{sub 2} ambients. While total degradation of properties (superconducting and structural) occur at the same temperatures for all phases, 600 C in N{sub 2} and 700 C in O{sub 2}, the onset of degradation occurs at somewhat lower temperatures for Tl-1212 than for Tl-2212 films. In all cases, sample degradation is associated with Tl depletion from the films.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
10188
Report Number(s):
SAND99-2174J
TRN: AH200125%%369
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Journal of Materials Research
Additional Journal Information:
Other Information: Submitted to Journal of Materials Research; PBD: 23 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS; ACETONE; CRYOGENICS; CUPRATES; METHANOL; MOISTURE; STABILITY; THERMAL CYCLING; THIN FILMS

Citation Formats

Siegal, M.P., Overmyer, D.L., Venturini, E.L., Padilla, R.R., and Provencio, P.N. Stability of Tl-Ba-Ca-Cu-O Superconducting Thin Films. United States: N. p., 1999. Web. doi:10.1557/JMR.1999.0609.
Siegal, M.P., Overmyer, D.L., Venturini, E.L., Padilla, R.R., & Provencio, P.N. Stability of Tl-Ba-Ca-Cu-O Superconducting Thin Films. United States. doi:10.1557/JMR.1999.0609.
Siegal, M.P., Overmyer, D.L., Venturini, E.L., Padilla, R.R., and Provencio, P.N. Mon . "Stability of Tl-Ba-Ca-Cu-O Superconducting Thin Films". United States. doi:10.1557/JMR.1999.0609. https://www.osti.gov/servlets/purl/10188.
@article{osti_10188,
title = {Stability of Tl-Ba-Ca-Cu-O Superconducting Thin Films},
author = {Siegal, M.P. and Overmyer, D.L. and Venturini, E.L. and Padilla, R.R. and Provencio, P.N.},
abstractNote = {We report the stability of TlBa{sub 2}CaCu{sub 2}O{sub 7} (Tl-1212) and Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} (T1-2212) thin films and by inference, the stability of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9} (Tl-1223) and Tl{sub 2}Ba{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10} (Tl-2223) thin films, under a variety of conditions. In general, we observe that the stability behavior of the single Tl-O layer materials (Tl-1212 and Tl-1223)are similar and the double Tl-O layer materials (Tl-2212 and Tl-2223) are similar. All films are stable with repeated thermal cycling to cryogenic temperatures. Films are also stable in acetone and methanol. Moisture degrades film quality rapidly, especially in the form of vapor. Tl-1212 is more sensitive to vapor than Tl-2212. These materials are stable to high temperatures in either N{sub 2}, similar to vacuum for the cuprates, and O{sub 2} ambients. While total degradation of properties (superconducting and structural) occur at the same temperatures for all phases, 600 C in N{sub 2} and 700 C in O{sub 2}, the onset of degradation occurs at somewhat lower temperatures for Tl-1212 than for Tl-2212 films. In all cases, sample degradation is associated with Tl depletion from the films.},
doi = {10.1557/JMR.1999.0609},
journal = {Journal of Materials Research},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}