Superconducting anisotropy in Nd1.85Ce0.15CuO4 single crystals

被引：5
|
作者：
Yamamoto, N
Ishida, T [1 ]
Okuda, K
Kurahashi, K
Yamada, K
机构：
[1] Univ Osaka Prefecture, Dept Phys & Elect, Sakai, Osaka 5998531, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[3] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan
来源：
PHYSICA C | 2001年 / 357卷 / SUPPL. 2期
关键词：
Nd1.85Ce0.15CuO4; magnetic torque; anisotropy; irreversibility line;
D O I：
10.1016/S0921-4534(01)00232-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetic torque of the Nd1.85Ce0.15CuO4 crystal consists of three contributions in the superconducting state, i.e., (1) a torque of the anisotropic magnetic moment of the Nd3+ ions, (2) a torque coming from the mass difference between m(ab), and m(c) and (3) a torque of the vortex lock-in states appeared when the field is applied parallel to the CuO2 planes. We analyze a torque component arising from the mass anisotropy by using the anisotropic London model and obtain an anisotropy parameter gamma (c) = 28 +/- 3. The irreversibility line of Nd1.85Ce0.15CuO4 is in excellent accordance with that of the La-based cuprate. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：298 / 301
页数：4
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