Anisotropy parameters of superconducting MgB2

被引：47

作者：

Kogan, VG ^{[1
]}

Bud'ko, SL ^{[1
]}

机构：

[1] Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 385卷 / 1-2期

关键词：

upper critical field; penetration depth; anisotropy; torque;

D O I：

10.1016/S0921-4534(02)02293-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Data on macroscopic superconducting anisotropy of MgB2 are reviewed. The data are described within a weak coupling two-gaps anisotropic s-wave model of superconductivity. The calculated ratio of the upper critical fields gamma(H) = H-c2.ab/H-c2,H-c increases with decreasing temperature in agreement with available data, whereas the calculated ratio of London penetration depths gamma(lambda) = lambda(c)/lambda(ab) decreases to reach approximate to1.1 at T = 0. Possible macroscopic consequences of gamma(lambda) not equal gamma(H) are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：131 / 142

页数：12

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