Magnetic pinning of the vertex lattice by arrays of submicrometric dots

被引：105

作者：

Jaccard, Y ^{[1
]}

Martin, JI ^{[1
]}

Cyrille, MC ^{[1
]}

Velez, M ^{[1
]}

Vicent, JL ^{[1
]}

Schuller, IK ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.58.8232

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have prepared regular square arrays of Ni and Ag dots with typical diameter and thickness approaching characteristic low-T-c superconducting length scales. The transport properties of Nb films, grown on top of these dots, were studied in a wide temperature and magnetic-field range. The Ni dots act as pinning centers. thereby producing oscillations in the field dependence of the resistance and critical current of the Nb film. The periodicity of the oscillation corresponds to the matching field of the dots lattice spacing. Such an oscillatory behavior is absent for arrays of nonmagnetic Ag dots. The comparison between the two types of arrays implies a magnetic origin of the enhanced pinning effect.

引用

页码：8232 / 8235

页数：4

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