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
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.
引用
收藏
页码:2821 / 2824
页数:4
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