Upper critical field of spin-ladder Sr2Ca12Cu24O41

被引：14

作者：

Nakanishi, T

Takahashi, H

Takeshita, N

Môri, N

Motoyama, N

Eisaki, H

Uchida, S

Fujino, H

Nagata, T

Akimitsu, J

机构：

[1] Nihon Univ, Coll Humanities & Sci, Setagaya Ku, Tokyo 1568550, Japan

[2] Univ Tokyo, Inst Solid State Phys, Tokyo 1068666, Japan

[3] Univ Tokyo, Dept Superconduct, Tokyo 1138656, Japan

[4] Aoyama Gakuin Univ, Dept Phys, Tokyo 1578572, Japan

来源：

PHYSICA B | 2000年 / 281卷

关键词：

spin ladders; anisotropic superconductors; superconducting properties; high pressure;

D O I：

10.1016/S0921-4526(99)00966-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the upper critical magnetic field, H-c2(T), of the spin-ladder Sr14-xCaxCU24O41 (X = 12) Single crystal, which becomes superconducting above similar to 3.0GPa. From the measurements of the temperature dependence of AC susceptibility at 4.0 GPa in magnetic fields applied along the a-axis (perpendicular to ladder), the b-axis (perpendicular to ladder-plane) and the c-axis (parallel to ladder), we have determined H-c2(T) for these three directions down to about 1.6 K. A clear difference is observed among these three curves, indicating that this system has an anisotropic superconducting ground state. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：957 / 958

页数：2

共 3 条

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