Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements -: art. no. 140501

被引：143

作者：

Eltsev, Y ^{[1
]}

Lee, S ^{[1
]}

Nakao, K ^{[1
]}

Chikumoto, N ^{[1
]}

Tajima, S ^{[1
]}

Koshizuka, N ^{[1
]}

Murakami, M ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.65.140501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the study of the electronic anisotropy of the MgB2 superconductor using the in-plane resistivity measurements in the magnetic field applied perpendicular and parallel to Mg and B planes of MgB2 single crystals. The results show the temperature dependent anisotropy of the upper critical field with the anisotropy ratio gamma=H-c2parallel to/H-c2perpendicular to increasing from 2.2 close to T-c up to about 3 below 30 K. Our estimation of the in-plane and out-of-plane coherence length of about xi(ab)(0)=68 Angstrom and xi(c)(0)=23 Angstrom and the electronic mean-free path l(ab)=240 Angstrom and l(c)=60 Angstrom, respectively, indicates MgB2 single crystal approaches the clean limit type-II superconductor.

引用

页码：1 / 4

页数：4

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