SUPERHEATING OF THE ABRIKOSOV FLUX LATTICE

被引：83

作者：

CHARALAMBOUS, M

CHAUSSY, J

LEJAY, P

VINOKUR, V

机构：

[1] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

[2] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.71.436

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on thermal cycling of an YBa2Cu3O7 single crystal close to the melting temperature of the flux lattice for H(parallel-to)ab. Transport current is along the c axis and the temperature stability is better than 1 mK. The melting (freezing) transition of the flux lattice occurs at different temperatures (DELTAT = 7 mK) between the cooling and the heating cycle. Hysteresis disappears for slightly increased current density (0.1 A/cm2). Comparison of thermal cycles reveals that the Abrikosov lattice superheats, in contrast with the usual behavior in real crystals where surface premelting is important. This can be due to its imbedding in the real crystal and the consequent surface pinning.

引用

页码：436 / 439

页数：4

共 28 条

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