NDLI: Fabrication of Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ thin film grain boundary junctions

Content Provider	IEEE Xplore Digital Library
Author	Ohbayashi, K. Fujii, H. Kuzuhara, A. Ohtsuki, T. Inoue, M. Fujimaki, A. Hayakawa, H.
Copyright Year	2002
Abstract	As-grown high-quality superconducting thin films of the Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ were prepared by RF magnetron sputtering with a regulated shuttering technique. 2223 phase films with a 2201 phase buffer layer were deposited on MgO (100) substrates under rigorous control of the bismuth content and valence. As a source of bismuth, Bi(metal) and Bi/sub 2/Sr/sub 2/CuO/sub x/ targets were used. At the preparation no post-treatment steps were performed. The zero resistivity critical temperature of the as-grown film was 107.3 K. Using these films, Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ step-edge and bicrystal Josephson junctions were prepared. At step-edge junctions, Josephson current was observed up to 41 K, below this temperature I-V curves were RSJ-like. On the other hand, bicrystal junctions were fabricated,on the bicrystal MgO (100) substrate with a misorientation angle of 24/spl deg/. Typical RSJ model I-V curves were observed up to 60 K. The modulation depth goes up to 90%. I/sub c/R/sub n/ values were about 1.0 mV at 4.2 K.<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2816
Ending Page	2819
Page Count	4
File Size	354859
File Format	PDF
ISSN	10518223
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fabrication Bismuth Strontium Substrates Temperature Superconducting thin films Radio frequency Superconducting magnets Sputtering Superconducting films
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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