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Title: High performance YBCO films. Report for 25 May-25 August 1994

Abstract

High quality YBCO films were successfully deposited on 2.5 cm by 2.5 cm magnesium fluoride substrates. Critical temperatures of 88-89K and transition widths of 0.5K were obtained. Surface quality of Sarnoff-polished magnesium fluoride was improved to a level that produced a Chi-min of about 17% using Rutherford Backscattering. The maximum STO dielectric layer thickness (for capacitor between ground plane and power plane layers) was found to be 2000 angstroms or less in order to allow re-oxygenation of underlying YBCO ground plane. A new bismuth oxide based glass for bonding of the YBCO sample to the metal handle was identified. This glass showed significantly less interaction with silver and better stability at 750K under vacuum than the previously used PbO-based glass. A five micron thick silver layer for the power plane was found sufficient for preventing any reduction of its conductivity due to interaction with the bonding glass during firing. Patterned glass/metal handle attachment to YBCO samples showed good adhesion.

Authors:
; ; ; ;
Publication Date:
Research Org.:
David Sarnoff Research Center, Princeton, NJ (United States)
OSTI Identifier:
6997841
Report Number(s):
AD-A-283870/4/XAB
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; SYNTHESIS; TRANSITION TEMPERATURE; THIN FILMS; BARIUM OXIDES; COPPER OXIDES; MAGNESIUM FLUORIDES; SUBSTRATES; YTTRIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; FILMS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; MAGNESIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360207 - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Denlinger, E J, Fathy, A, Kalokitis, D, Pendrick, V, and Thaler, B. High performance YBCO films. Report for 25 May-25 August 1994. United States: N. p., 1994. Web.
Denlinger, E J, Fathy, A, Kalokitis, D, Pendrick, V, & Thaler, B. High performance YBCO films. Report for 25 May-25 August 1994. United States.
Denlinger, E J, Fathy, A, Kalokitis, D, Pendrick, V, and Thaler, B. 1994. "High performance YBCO films. Report for 25 May-25 August 1994". United States.
@article{osti_6997841,
title = {High performance YBCO films. Report for 25 May-25 August 1994},
author = {Denlinger, E J and Fathy, A and Kalokitis, D and Pendrick, V and Thaler, B},
abstractNote = {High quality YBCO films were successfully deposited on 2.5 cm by 2.5 cm magnesium fluoride substrates. Critical temperatures of 88-89K and transition widths of 0.5K were obtained. Surface quality of Sarnoff-polished magnesium fluoride was improved to a level that produced a Chi-min of about 17% using Rutherford Backscattering. The maximum STO dielectric layer thickness (for capacitor between ground plane and power plane layers) was found to be 2000 angstroms or less in order to allow re-oxygenation of underlying YBCO ground plane. A new bismuth oxide based glass for bonding of the YBCO sample to the metal handle was identified. This glass showed significantly less interaction with silver and better stability at 750K under vacuum than the previously used PbO-based glass. A five micron thick silver layer for the power plane was found sufficient for preventing any reduction of its conductivity due to interaction with the bonding glass during firing. Patterned glass/metal handle attachment to YBCO samples showed good adhesion.},
doi = {},
url = {https://www.osti.gov/biblio/6997841}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Aug 25 00:00:00 EDT 1994},
month = {Thu Aug 25 00:00:00 EDT 1994}
}

Technical Report:
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