Flux creep and relaxation phenomena in the presence of weak AC magnetic field

Author

Kasatkin, A.L. ; Pan, V.M. ; Vysotskii, V.V. ; Freyhardt, H.C.

Author_Institution

Inst. of Metal Phys., Acad. of Sci., Kiev, Ukraine

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1467

Lastpage

1469

Abstract

Evolution of the dynamic vortex response during the relaxation process In a superconducting slab situated in parallel DC magnetic field H/sub 0/ and superimposed weak AC field h/sub AC//spl sim/ exp(i/spl omega/t) is studied theoretically for the nonlinear vortex diffusion coefficient corresponding to the vortex liquid state. The phenomenon of "dynamical melting" of the vortex lattice at high induced current levels and its possible manifestation in relaxation characteristics of the dynamic vortex response are discussed. The flux creep rate and the irreversible magnetisation decay are shown to be enhanced by application of weak AC magnetic field h/sub AC/.

Keywords

flux creep; flux pinning; magnetic field effects; magnetisation; dynamic vortex response; dynamical vortex melting; flux creep; flux relaxation phenomena; irreversible magnetisation decay; nonlinear vortex diffusion coefficient; parallel DC magnetic field; vortex liquid state; weak AC magnetic field; Conductivity; Creep; Lattices; Magnetic fields; Magnetic flux; Magnetic liquids; Magnetization; Nonlinear equations; Physics; Slabs;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620849

Filename

620849