VORTEX PHASE-DIAGRAM OF BI2SR2CACU2O8-Y NEAR THE SUPERCONDUCTING TRANSITION

被引：31

作者：

WAN, YM

HEBBOUL, SE

GARLAND, JC

机构：

[1] Department of Physics, Ohio State University, Columbus

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.72.3867

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Six-terminal measurements of the resistive transition of Bi2Sr2CaCu2O8-y crystals in a weak external magnetic field H parallel-to c axis are analyzed to deduce the magnetic H-T phase diagram near the superconducting transition. We find evidence for two magnetic field boundaries, namely, a depinning field H(p)(T), and a 3D-2D crossover field H(m)(T) greater-than-or-equal-to H(p)(T), each of which intersects the H = 0 axis at a temperature above the zero-field a-b plane transition temperature. We interpret the crossover field H(m)(T) as marking the boundary between 3D vortex lines and interacting 2D vortices.

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页码：3867 / 3870

页数：4

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