DocumentCode :
939800
Title :
Strong decrease of anisotropy by lead-substitution in Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/
Author :
Regi, F.X. ; Schneck, J. ; Savary, H. ; Daguet, C. ; Huet, F.
Author_Institution :
CNET, Bagneux, France
Volume :
3
Issue :
1
fYear :
1993
fDate :
3/1/1993 12:00:00 AM
Firstpage :
1190
Lastpage :
1193
Abstract :
The in-plane ( rho /sub ab/) and out-of-plane ( rho /sub c/)/sub c/ resistivities were measured above the critical temperature, T/sub c/, in several lead-substituted single crystals of Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/ and compared to the results obtained for lead-free samples. It was found that the lead substitution induces an important decrease of rho /sub c/, resulting in a lowering of the anisotropy rho /sub c// rho /sub ab/ by two orders of magnitude near T/sub c/. Moreover, rho /sub c/ changes its behavior from a semiconducting type of behavior to a metallic one. These results are related to the role of lead, which was recently inferred from structural considerations. The possibility of improving the out-of-plane critical current by lead substitution is discussed.<>
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; strontium compounds; superconducting transition temperature; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+y/; HTSC; anisotropy; critical temperature; in-plane resistivity; out-of-plane critical current; out-of-plane resistivity; semiconducting type behaviour; Anisotropic magnetoresistance; Bismuth; Crystals; Electrical resistance measurement; Electrodes; Environmentally friendly manufacturing techniques; Lead; Satellites; Strontium; Temperature dependence;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.233339
Filename :
233339
Link To Document :
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