FLUCTUATION EFFECTS ON A STRONGLY PINNED VORTEX LATTICE IN A THIN TYPE-II SUPERCONDUCTING WIRE

被引：13

作者：

LING, XS

MCCAMBRIDGE, JD

RIZZO, ND

SLEIGHT, JW

PROBER, DE

MOTOWIDLO, LR

ZEITLIN, BA

机构：

[1] YALE UNIV,DEPT APPL PHYS,NEW HAVEN,CT 06520

[2] YALE UNIV,DEPT APPL PHYS,NEW HAVEN,CT 06520

[3] IGC ADV SUPERCOND INC,WATERBURY,CT 06704

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.74.805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on transport properties of the vortex lattice in fine, round NbTi wires fabricated by a novel wire-drawing process. The voltage onset in the isothermal I-V characteristic is sharp for thick wires (d1 μm) at 4.2 K and 6 T, but is rounded for thinner wires. The thinnest wires also display an Ohmic resistivity at low current densities. This linear resistivity decreases exponentially with temperature near Tc(H) and approaches a constant value at low temperatures. We explain our results as finite size effects of the thermal and quantum collective creep of vortex lines. © 1995 The American Physical Society.

引用

页码：805 / 808

页数：4

共 22 条

[1] THEORY OF FLUX CREEP IN HARD SUPERCONDUCTORS [J].