Article (Scientific journals)
Imprinting superconducting vortex footsteps in a magnetic layer
Brisbois, Jérémy; Motta, Maycon; Avila Osses, Jonathan et al.
2016In Scientific Reports, 6, p. 27159
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Keywords :
superconductivity; magnetism; heterostructures; magneto-optical imaging; magnetic recording; flux avalanches
Abstract :
[en] Local polarization of a magnetic layer, a well-known method for storing information, has found its place in numerous applications such as the popular magnetic drawing board toy or the widespread credit cards and computer hard drives. Here we experimentally show that a similar principle can be applied for imprinting the trajectory of quantum units of flux (vortices), travelling in a superconducting film (Nb), into a soft magnetic layer of permalloy (Py). In full analogy with the magnetic drawing board, vortices act as tiny magnetic scribers leaving a wake of polarized magnetic media in the Py board. The mutual interaction between superconducting vortices and ferromagnetic domains has been investigated by the magneto-optical imaging technique. For thick Py layers, the stripe magnetic domain pattern guides both the smooth magnetic flux penetration as well as the abrupt vortex avalanches in the Nb film. It is however in thin Py layers without stripe domains where superconducting vortices leave the clearest imprints of locally polarized magnetic moment along their paths. In all cases, we observe that the flux is delayed at the border of the magnetic layer. Our findings open the quest for optimizing magnetic recording of superconducting vortex trajectories.
Disciplines :
Physics
Author, co-author :
Brisbois, Jérémy ;  Université de Liège > Département de physique > Physique expérimentale des matériaux nanostructurés
Motta, Maycon
Avila Osses, Jonathan ;  Université de Liège > Département de physique > Physique expérimentale des matériaux nanostructurés
Shaw, Gorky ;  Université de Liège > Département de physique > Physique expérimentale des matériaux nanostructurés
Devillers, Thibaut
Dempsey, Nora M.
Veerapandian, Savita K. P.
Colson, Pierre  ;  Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT
Vanderheyden, Benoît  ;  Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes
Vanderbemden, Philippe  ;  Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Ortiz, Wilson A.
Nguyen, Ngoc Duy  ;  Université de Liège > Département de physique > Physique des solides, interfaces et nanostructures
Kramer, Roman B. G.
Silhanek, Alejandro  ;  Université de Liège > Département de physique > Physique expérimentale des matériaux nanostructurés
More authors (4 more) Less
Language :
English
Title :
Imprinting superconducting vortex footsteps in a magnetic layer
Publication date :
06 June 2016
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
6
Pages :
27159
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 June 2016

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