Depinning of caged interstitial vortices in superconducting alpha-WGe films with an antidot lattice

被引：100

作者：

Rosseel, E ^{[1
]}

VanBael, M ^{[1
]}

Baert, M ^{[1
]}

Jonckheere, R ^{[1
]}

Moshchalkov, VV ^{[1
]}

Bruynseraede, Y ^{[1
]}

机构：

[1] INTERUNIV MICROELECTR CTR, B-3001 LOUVAIN, BELGIUM

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.53.R2983

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetoresistance, critical currents, and voltage-current (V-I) characteristics have been studied in superconducting a-WGe films with a square lattice of cylindrical microholes (antidots). Besides a strong enhancement of the critical current caused by matching of the flux lines with the antidot lattice having a period d, two different dissipative regimes have been observed giving rise to a crossover in the [log(V)-log(I)] characteristics for magnetic fields above the first matching field B-1=B-phi=Phi(0)d(-2). This V-I behavior is caused by the coexistence of a weakly pinned interstitial vortex fluid and a strongly pinned vortex lattice at the antidots.

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页码：R2983 / R2986

页数：4

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