Evidence for a depinning transition in the vortex quasilattice of Bi2Sr2CaCu2O8+delta

被引：17

作者：

Dewhurst, CD

Doyle, RA

机构：

[1] Interdisciplinary Research Centre in Superconductivity, University of Cambridge

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.56.10832

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetization measurements have been performed on several crystals of Bi2Sr2CaCu2O8+delta as a function of both temperature and magnetic field. A pinning crossover for vortices is identified at fields above the arrowhead second peak transition but below the irreversibility line in agreement with recent Hall-array measurements. In addition, a small but clear feature is apparent in the derivative of the magnetic moment as a function of temperature at fields below that of the arrowhead at an almost field-independent temperature of about 32 K. These features define a pinning-related transition that crosses continuously from the disordered into the ordered vortex solid phase. [S0163-1829(97)02641-6].

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页码：10832 / 10835

页数：4

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