期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 388, 期 -, 页码 107-108出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4534(02)02672-2
关键词
MgB2; specific heat; single crystal; irradiation
The two-gap structure of MgB2 gives rise to unusual thermodynamic properties which depart markedly from the single-gap BCS model, both in their temperature- and field-dependence. We report measurements of the specific heat up to 16 T on ceramic and single crystal samples, which demonstrate these effects in bulk. The low-temperature mixed-state specific heat reveals a field-dependent anisotropy, and points to the existence of unusually large vortices, in agreement with local density-of-states measurements by scanning tunneling spectroscopy. It is finally shown that a suitable irradiation process nearly doubles H-c2 in the bulk. (C) 2003 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据