Vortex dynamics in percolative superconductors containing fractal clusters of a normal phase

Author

Kuzmin, Yuriy I.

Author_Institution

A.F. Ioffe Physicotech. Inst., Acad. of Sci., St. Petersburg, Russia

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

3750

Lastpage

3753

Abstract

The effect of fractal clusters on magnetic and transport properties of percolative superconductors is studied. The superconductor contains percolative superconducting cluster carrying a transport current and clusters of a normal phase. It is found that normal phase clusters have essential fractal features. The fractal dimension of the boundary of normal phase clusters is estimated. The current-voltage (V-I) characteristics of superconductors containing fractal clusters are obtained. It is found that the fractality of the cluster boundary intensifies pinning. This feature permits to enhance the current-carrying capability of the superconductors.

Keywords

critical currents; flux pinning; fractals; superconducting materials; critical current; current-carrying capability; current-voltage characteristics; fractal clusters; magnetic properties; normal phase clusters; percolative superconductors; transport properties; vortex dynamics; Critical current; Fractals; High temperature superconductors; Lorentz covariance; Magnetic flux; Superconducting epitaxial layers; Superconducting filaments and wires; Superconducting films; Superconducting magnets; Superconductivity; Critical current; fractal; pinning; vortex;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849421

Filename

1440487