Superheating and supercooling of vortex matter in a Nb single crystal: Direct evidence for a phase transition at the peak effect from neutron diffraction

被引：144

作者：

Ling, XS ^{[1
]}

Park, SR

McClain, BA

Choi, SM

Dender, DC

Lynn, JW

机构：

[1] Brown Univ, Dept Phys, Providence, RI 02912 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Univ Maryland, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.86.712

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of a striking history dependence of the structure function of vortex matter in the peak effect regime in a Nb single crystal by using small angle neutron scattering combined with in situ magnetic susceptibility measurements. Metastable phases of vortex matter, supercooled vortex liquid and superheated vortex solid, have been identified. We interpret our results as direct structural evidence for a first-order vortex solid-liquid transition at the peak effect. DOI: 10.1103/PhysRevLett.86.712.

引用

页码：712 / 715

页数：4

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