VORTEX LIQUID DISORDER AND THE FIRST-ORDER MELTING TRANSITION IN YBA2CU3O7-DELTA

被引：195

作者：

KWOK, WK

FENDRICH, J

FLESHLER, S

WELP, U

DOWNEY, J

CRABTREE, GW

机构：

[1] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCOND,ARGONNE,IL 60439

[2] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.72.1092

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present transport measurements in high quality untwinned crystals of YBa2Cu3O7-delta in fields up to 8 T. We find an extremely sharp resistive transition at the first order vortex freezing transition T-m, with width much narrower than the zero field transition width. The resistive transition as a function of magnetic held is equally sharp with freezing occurring within 10 Oe in a field of about 6 T. There is dramatic asymmetric hysteresis in the field dependence of the resistivity related to the unpinned nature of the vortex liquid state.

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页码：1092 / 1095

页数：4

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