Angular dependence of the order-disorder transition in proton irradiated single crystal MgB2 -: art. no. 224509

被引：8

作者：

Moore, JD

Perkins, GK

Caplin, AD

Jun, J

Kazakov, SM

Karpinski, J

Cohen, LF

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

[2] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.71.224509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present magnetization results on a proton irradiated MgB2 single crystal that displays a peak in magnetization for the field applied parallel to the c axis. Magnetic history effects are observed, which are ascribed to the occurrence of a disorder driven phase transition close to an inflection point in the magnetization-field curve. We demonstrate that the angular and temperature dependence of this feature is significantly different to that of the lower and upper critical fields.

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