DYNAMICS OF FLAT SUPERCONDUCTORS IN A PERPENDICULAR MAGNETIC-FIELD

被引：77

作者：

BRANDT, EH

机构：

[1] Max-Planck-Institut für Metallforschung, Institut für Physik

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.71.2821

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The theory of flux-line motion and ac response of a thin superconducting strip or circular disk in perpendicular time-dependent magnetic field is given. Flux dynamics in general is governed by a complex nonlinear sheet resistivity rho/d (d is the thickness). In contrast to longitudinal fields, perpendicular field changes do not obey a diffusion equation but an integral equation with singular kernel. Screening currents immediately penetrate to the strip center and at times t >> tau0 decay as exp(-t/tau0) with tau0 = 0.249admu0/p (2a is the strip width). Maximum ac losses occur at omegatau0 = 1.11.

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页码：2821 / 2824

页数：4

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