OBSERVATION OF FLUX CREEP THROUGH COLUMNAR DEFECTS IN YBA2CU3O7 CRYSTALS

被引：39

作者：

KONCZYKOWSKI, M

VINOKUR, VM

RULLIERALBENQUE, F

YESHURUN, Y

HOLTZBERG, F

机构：

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

[2] BAR ILAN UNIV,DEPT PHYS,RAMAT GAN,ISRAEL

[3] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.47.5531

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Defects in the form of cylindrical amorphous tracks were introduced into YBa2Cu3O7 crystals by irradiation with 5.3-GeV Pb ions. The columnar defects formed provide maximum possible pinning of flux lines parallel to the tracks and induce giant enhancement of magnetic irreversibility. However, even for this strong pinning, magnetic decay was measured at high temperatures. Relaxation is nonlogarithmic and exhibits an increase of the effective barrier for flux creep with decreasing persistent current. This behavior is interpreted in the framework of the nucleation creep model.

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页码：5531 / 5534

页数：4

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