Local magnetic properties of high-Tc superconductors probed by scanning SQUID microscopy

被引：0
|
作者：
Kasai, J
Okazaki, N
Nakayama, Y
Motohashi, T
Shimoyama, J
Kishio, K
Koinuma, H
Hasegawa, T
机构：
[1] Tokyo Inst Technol, Frontier Collaborat Res Ctr, Midori Ku, Yokohama, Kanagawa 2268503, Japan
[2] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 1138656, Japan
[3] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 388卷
关键词：
high-T-c; superconductivity; scanning SQUID microscopy; Josephson vortex;
D O I：
10.1016/S0921-02426-7
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have performed scanning SQUID (superconducting quantum interference device) microscopy (SSM) on the ac-surfaces of heavily Pb-doped Bi2212, Bi1.6Pb0.6Sr1.8CaCu2Oy, single crystals at low temperatures. The observed images demonstrated interlayer Josephson vortices below T-c. The value of c-axis penetration depth, lambda(c), evaluated from the SSM images was 11.2 +/- 0.7 mum, which is approximately one order of magnitude smaller than that of pure Bi2212 in the optimal doping regime. This clearly indicates that Pb doping substantially reduces the anisotropy of Bi2212. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：267 / 268
页数：2
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