Title
|
|
|
|
Dynamics of the superconducting condensate in the presence of a magnetic field : channelling of vortices in superconducting strips at high currents
|
|
Author
|
|
|
|
|
|
Abstract
|
|
|
|
On the basis of the time-dependent Ginzburg-Landau equation we studied the dynamics of the superconducting condensate in a wide two-dimensional sample in the presence of a perpendicular magnetic field and applied current. We could identify two critical currents: the current at which the pure superconducting state becomes unstable (J(c2)(1)) and the current at which the system transits from the resistive state to the superconducting state (J(c1) < J(c2)). The current J(c2) decreases monotonically with external magnetic field, while J(c1) exhibits a maximum at H*. For sufficient large magnetic fields the hysteresis disappears and J(c1) = J(c2) = Jc. In this high magnetic field region and for currents close to Jc the voltage appears as a result of the motion of separate vortices. With increasing current the moving vortices form,channels' with suppressed order parameter along which the vortices can move very fast. This leads to a sharp increase of the voltage. These 'channels' resemble in some respect the phase slip lines which occur at zero magnetic field. (C) 2004 Elsevier B.V. All rights reserved. |
|
|
Language
|
|
|
|
English
|
|
Source (journal)
|
|
|
|
Physica: C : superconductivity. - Amsterdam, 1988, currens
|
|
Publication
|
|
|
|
Amsterdam
:
North-Holland
,
2004
|
|
ISSN
|
|
|
|
0921-4534
[print]
1873-2143
[online]
|
|
DOI
|
|
|
|
10.1016/J.PHYSC.2003.10.027
|
|
Volume/pages
|
|
|
|
404
:1-4
(2004)
, p. 400-404
|
|
ISI
|
|
|
|
000221211500074
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
Full text (publisher's version - intranet only)
|
|
|
|
|
|