NDLI: Small area Y-Ba-Cu-O thin films for applications in hot-electron bolometers

Content Provider	IEEE Xplore Digital Library
Author	Vale, L.R. Ono, R.H.
Copyright Year	2002
Abstract	We are investigating the use of very thin, small area YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) films on Si substrates for application in hot-electron bolometers. Hot-electron bolometers produced from high-T/sub c/ materials will be favored over their low-temperature counterparts in applications of radio astronomy and atmospheric physics where the higher operating temperatures provide distinct advantages. Devices on Si can help advance this technology for bolometric space applications, where a substrate is needed with good thermal conductance and excellent IR performance. Based on our experience with YBCO bolometers and YBCO film growth on Si, we have begun a study of sub-micrometer scale devices. Our typical YBCO films grown on Si by pulsed laser deposition have critical temperatures of 86 K and critical currents of 1-3/spl times/10/sup 6/ A/cm/sup 2/ at 77 K for YBCO microbridges 45 nm thick. We have made 1-2 /spl mu/m wide microbridges from YBCO films of 25 nm to 45 nm thick. These microbridges show reduced critical temperatures of 71 K to 81 K, respectively, related to the processing sequence that produces the microbridges.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	762
Ending Page	765
Page Count	4
File Size	385188
File Format	PDF
ISSN	10518223
Volume Number	11
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yttrium barium copper oxide Transistors Semiconductor films Bolometers Temperature Substrates Space technology Pulsed laser deposition Conducting materials Radio astronomy
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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