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Shaw G, Brisbois J, Pinheiro LBGL, Müller J, Blanco Alvarez S, Devillers T, Dempsey NM, Scheerder JE, Van de Vondel J, Melinte S, Vanderbemden P, Motta M, Ortiz WA, Hasselbach K, Kramer RBG, Silhanek AV. Quantitative magneto-optical investigation of superconductor/ferromagnet hybrid structures. Rev Sci Instrum 2018; 89:023705. [PMID: 29495853 DOI: 10.1063/1.5016293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
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 are 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 fields and field gradients generated by the magnetic layer.
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Affiliation(s)
- G Shaw
- Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium
| | - J Brisbois
- Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium
| | - L B G L Pinheiro
- Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil
| | - J Müller
- Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium
| | - S Blanco Alvarez
- Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium
| | - T Devillers
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38000, Grenoble, France
| | - N M Dempsey
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38000, Grenoble, France
| | - J E Scheerder
- Laboratory of Solid-State Physics and Magnetism, KU Leuven, Celestijnenlaan 200 D, Box 2414, B-3001 Leuven, Belgium
| | - J Van de Vondel
- Laboratory of Solid-State Physics and Magnetism, KU Leuven, Celestijnenlaan 200 D, Box 2414, B-3001 Leuven, Belgium
| | - S Melinte
- Université catholique de Louvain, Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTM), Institut de la Matière Condensée et des Nanosciences (IMCN), 1348 Louvain-la-Neuve, Belgium
| | - P Vanderbemden
- Université de Liège, SUPRATECS and Department of Electrical Engineering and Computer Science, Sart Tilman B-4000, Belgium
| | - M Motta
- Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil
| | - W A Ortiz
- Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil
| | - K Hasselbach
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38000, Grenoble, France
| | - R B G Kramer
- Univ. Grenoble Alpes, CNRS, Institut Néel, 38000, Grenoble, France
| | - A V Silhanek
- Experimental Physics of Nanostructured Materials, Q-MAT, CESAM, Université de Liège, B-4000 Sart Tilman, Belgium
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