Fluctuation conductivity in (Bi,Pb)2Sr2Ca2Cu3Oy/Ag multi-layered bulk system

被引：12
作者：
Satoh, H
Tanabe, T
Nakane, H
Yoshizawa, S
Mori, N
机构：
[1] Oyama Natl Coll Technol, Dept Elect & Comp Engn, Oyamashi 3230806, Japan
[2] Kogakuin Univ, Dept Elect Engn, Shinjuku Ku, Tokyo 1638677, Japan
[3] Meisei Univ, Dept Chem, Tokyo 1918506, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 412卷
关键词：
Bi2223; superconductor; oxide/silver layers; fluctuation conductivity; critical current;
D O I：
10.1016/j.physc.2003.11.075
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Fluctuation conductivity sigma' perpendicular to the layer surface is studied in (Bi,Pb)(2)Sr(2)Ca(2)Cu(3)Ogamma/Ag multi-layered (Bi/Ag) systems prepared by stacking Ag sheets alternatively into the oxide superconductors. It has already been known that the critical current density J(c) in the layered systems is enhanced in proportion to the number of Ag sheets. Experimental data on sigma' are analyzed in terms of the Lawrence-Doniach theory with momentum- and energy-cutoffs. Because of good agreement between theory and experiment, we can evaluate several fitting parameters, and discuss relationship among the parameters and J(c). The results for our study could show an enhanced anisotropic character of the Bi/Ag systems probably due to the formation of a highly oriented structure, resulting in the improvement of J(c). (C) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：307 / 311
页数：5
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