Anisotropic superconductivity in epitaxial MgB2 films

被引：84

作者：

Jung, MH

Jaime, M

Lacerda, AH

Boebinger, GS

Kang, WN

Kim, HJ

Choi, EM

Lee, SI

机构：

[1] Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA

[2] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

[3] Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Superconduct, Pohang 790784, South Korea

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 343卷 / 5-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(01)00778-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We measure the in-plane electrical resistivity of epitaxial MgB2 thin films in magnetic fields to 60 T and estimate the superconducting upper critical field H-p(c) (0) 24 +/-3 T for field oriented along the c-axis, and H-g(ab)(0)approximate to 30 +/-2 T in the plane of the film. We find the zero-temperature coherence lengths xi (c)(0)approximate to 30 Angstrom and xi (ab)(0)approximate to 37 Angstrom to be shorter than the calculated electronic mean free path l approximate to 100 +/- 50 Angstrom, which places our films in the clean limit. These large upper critical fields make MgB2 a strong candidate for technological applications. (C) 2001 Published by Elsevier Science B.V.

引用

页码：447 / 451

页数：5

共 18 条

[1] Resistive upper critical fields and irreversibility lines of optimally doped high-Tc cuprates [J].