SURFACE PINNING AND GRAIN-BOUNDARY FORMATION IN MAGNETIC FLUX-LINE LATTICES OF BI2SR2CACU2O8+DELTA HIGH-T(C) SUPERCONDUCTORS

被引：30

作者：

DAI, HJ

LIU, J

LIEBER, CM

机构：

[1] Harvard University, Cambridge

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.72.748

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic decoration has been used to investigate the role of surface pinning on the flux-line lattice (FLL) of high-quality Bi2Sr2CaCu2O8+delta single crystals. We find that surface steps pin flux lines at the sample surface, and that strong pinning along large steps creates grain boundaries (GBs) in the FLL. Analysis of the competing energetics of pinning versus GB formation leads to a criterion for the formation of extended GBs, and also indicates that these GBs penetrate through the entire sample. Surface pinning, which should occur in all real samples, will thus significantly affect the bulk FLL structure in these materials.

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页码：748 / 751

页数：4

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