Title
Transverse instabilities of multiple vortex chains in magnetically coupled <tex>$NbSe_{2}$</tex>/permalloy superconductor/ferromagnet bilayers Transverse instabilities of multiple vortex chains in magnetically coupled <tex>$NbSe_{2}$</tex>/permalloy superconductor/ferromagnet bilayers
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa ,
Subject
Physics
Source (journal)
Physical review : B : solid state. - Lancaster, Pa, 1970 - 1978
Volume/pages
80(2009) :18 , p. 180506,1-180506,4
ISSN
0556-2805
ISI
000272310900031
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Using scanning tunneling microscopy and Ginzburg-Landau simulations, we explore vortex configurations in magnetically coupled NbSe2/permalloy superconductor/ferromagnet bilayer. The permalloy film with stripe domain structure induces periodic local magnetic induction in the superconductor, creating a series of pinning-antipinning channels for externally added magnetic flux quanta. Such laterally confined Abrikosov vortices form quasi-one-dimensional arrays (chains). The transitions between multichain states occur through propagation of kinks at the intermediate fields. At high fields we show that the system becomes nonlinear due to a change in both the number of vortices and the confining potential. The longitudinal instabilities of the resulting vortex structures lead to vortices levitating in the antipinning channels.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/845656/c02d150d.pdf
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