Superconducting anisotropy in double-chain YBa2Cu4O8 single crystals

被引：14
|
作者：
Kagawa, N
Ishida, T [1 ]
Okuda, K
Adachi, S
Tajima, S
机构：
[1] Osaka Prefecture Univ, Dept Phys & Elect, Sakai, Osaka 5998531, Japan
[2] ISTEC, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2001年 / 357卷 / 357-360期
关键词：
magnetic torque; mass anisotropy; YBa2Cu4O8; phase diagram;
D O I：
10.1016/S0921-4534(01)00233-7
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The c-axis anisotropy parameters of an YBa2Cu4O8 single crystal are gamma (ca) = (m(c)/m(a))(1/2) = 13.4 +/- 0.32 and gamma (cb) = (m(c)/m(a))(1/2) = 14.7 +/- 0.39 at 70 K in 10 kG. The in-plane anisotropy gamma (ab) = 1.12 +/- 0.06 is much smaller than gamma (ab) = 3 estimated from the normal-state resistivity, and is even smaller than y.b = 1. 18 0.05 of YBa, C11307, We consider that the CuO double chains do not exhibit their own superconductivity but presumably the proximity-induced superconductivity. The peak effects appeared in the torque curves suggest that the vortex phase diagram of YBa2Cu4O8 has an internal structure. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：302 / 304
页数：3
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