VORTEX CONFINEMENT BY COLUMNAR DEFECTS IN YBA2CU3O7 CRYSTALS - ENHANCED PINNING AT HIGH FIELDS AND TEMPERATURES

被引：1142

作者：

CIVALE, L

MARWICK, AD

WORTHINGTON, TK

KIRK, MA

THOMPSON, JR

KRUSINELBAUM, L

SUN, Y

CLEM, JR

HOLTZBERG, F

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

[2] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831

[3] IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011

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

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.67.648

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the realization of a microstructure which leads to very strong high-temperature flux pinning in YBa2CU3O7 crystals. Aligned discontinuous columns of damaged material, about 50 angstrom in diameter and more than 15-mu-m long, are produced by 580-MeV Sn-ion irradiation. The enhancement of flux pinning is largest when the applied magnetic field is aligned with these tracks. At high temperatures and fields the pinning is much greater than that produced by random point defects, and causes a considerable enlargement of the irreversibility region in the H-T plane.

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页码：648 / 651

页数：4

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