DocumentCode
1492848
Title
High T c thin film and device development
Author
Betts, K. ; Burbank, M.B. ; Cragg, A. ; Fife, A.A. ; Kubik, P.R. ; Lee, S. ; McCubbin, J. ; McKenzie, D. ; Tillotson, M. ; Taylor, B. ; Tran, H. ; Vrba, J. ; Chaklader, A.C.D. ; Roemer, G. ; Heinrich, B. ; Chrzanowski, J. ; Irwin, J.C.
Author_Institution
CTF Syst. Inc., Port Coquitlam, BC, Canada
Volume
25
Issue
2
fYear
1989
fDate
3/1/1989 12:00:00 AM
Firstpage
956
Lastpage
959
Abstract
Thin films of the high-T c superconductor YBa 2Cu3Oy have been deposited on various substrates by diode and magnetron sputtering using bulk sintered targets. These films have been analyzed by a variety of methods: scanning electron microscopy, X-rays, electron beam microprobe, mass spectroscopy and Raman spectroscopy. The stoichiometries of the films have been measured as a function of the radial position from the center of the sputtered beam at a fixed target-substrate distance. Patterning of the films has been carried out to form planar structures such as strip lines, microbridges and RF SQUIDs (superconducting quantum interference devices). The DC current-voltage characteristics of the microbridges were measured as a function of temperature. RF SQUID behavior has been observed for single-loop devices and their properties established at 4.2 K and higher temperatures. Flux-locked noise spectra with a 1/f noise power response were recorded in the frequency range from 0.01 to ≈100 Hz. RF SQUID signals have been observed for temperatures up to 55 K
Keywords
Raman spectroscopy; SQUIDs; barium compounds; electron probe analysis; high-temperature superconductors; mass spectrometer applications; scanning electron microscope examination of materials; sputtered coatings; superconducting junction devices; yttrium compounds; 0.01 to 100 Hz; 1/f noise power response; 4.2 to 55 K; DC current-voltage characteristics; RF SQUIDs; Raman spectroscopy; X-rays; YBa2Cu3Oy; bulk sintered targets; electron beam microprobe; fixed target-substrate distance; flux-locked noise spectra; high temperature superconductor; magnetron sputtering; mass spectroscopy; microbridges; planar structures; radial position; scanning electron microscopy; single-loop devices; strip lines; Diodes; Electron beams; Radio frequency; SQUIDs; Sputtering; Superconducting device noise; Superconducting films; Superconducting magnets; Superconducting thin films; Temperature;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.92447
Filename
92447
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