Current-driven vortex state in Bi2Sr2CaCu2O8+δ with columnar defects

被引：14

作者：

Sugano, R ^{[1
]}

Onogi, T

Hirata, K

Tachiki, M

机构：

[1] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan

[2] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.60.9734

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of applied current on the vortex-lines dynamics in heavy-ion-irradiated Bi2Sr2CaCu2O8+delta are studied through Monte Carlo simulation. From the analysis of current-voltage characteristics, we find a clear peak effect in the critical current density, prominent near the melting transition of the vortex solid, when the magnetic field is increased toward the matching held. The peak field corresponds to a fractional (approximate to 1/3) filling factor of the vortices to columnar defects. This enhanced vortex pinning occurs simultaneously with a rapid change in the interlayer-coupling nature of the current-driven vortex state. In addition, numerical results on current-driven moving vortex lines could also explain other anomalies obtained from the recent Josephson plasma measurements. [S0163-1829(99)03637-6].

引用

页码：9734 / 9737

页数：4

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