Magneto-optical imaging; superconductor/ferromagnet hybrids; magnetic flux avalanches
Abstract :
[en] We present a detailed quantitative magneto-optical imaging study of several superconductor/
ferromagnet hybrid structures, including Nb deposited on top of thermomagnetically patterned
NdFeB, and permalloy/niobium with erasable and tailored magnetic landscapes imprinted in the
permalloy layer. The magneto-optical imaging data is complemented with and compared to scanning Hall probe microscopy measurements. Comprehensive protocols have been developed for calibrating, testing, and converting Faraday rotation data to magnetic field maps. Applied to the acquired data, they reveal the comparatively weaker magnetic response of the superconductor from the background of larger fi elds and field gradients generated by the magnetic layer.
Disciplines :
Physics
Author, co-author :
Shaw, Gorky ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Brisbois, Jérémy ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Pinheiro, L.B.G.L.; Universidade Federal de Sao Carlos, Brazil
Müller, Jonas; Université de Liège - ULiège
Blanco Alvarez, Sylvain ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Devillers, T.; Univ. Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
Dempsey, N.M.; Univ. Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
Scheerder, J.E.; Katholieke Universiteit Leuven - KUL
Van de Vondel, J.; Katholieke Universiteit Leuven - KUL
Melinte, S.; Université Catholique de Louvain - UCL
Vanderbemden, Philippe ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Motta, M.; Universidade Federal de Sao Carlos, Brazil
Ortiz, W.A.; Universidade Federal de Sao Carlos, Brazil
Hasselbach, K.; Univ. Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
Kramer, R.B.G.; Univ. Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
Silhanek, Alejandro ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
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