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
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.
引用
收藏
页码:1092 / 1095
页数:4
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