arXiv Mesoscale and Nanoscale Physics
arXiv Mesoscale and Nanoscale Physics
5 years ago

Quantitative magneto-optical investigation of superconductor/ferromagnet hybrid structures.

S. Blanco Alvarez, J. Müller, G. Shaw, M. Motta, P. Vanderbemden, K. Hasselbach, W. A. Ortiz, T. Devillers, N. M. Dempsey, R. B. G. Kramer, S. Melinte, J. E. Scheerder, L. B. G. L. Pinheiro, J. Van de Vondel, J. Brisbois, A. V. Silhanek

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 fields and field gradients generated by the magnetic layer.

Publisher URL: http://arxiv.org/abs/1712.03723

DOI: arXiv:1712.03723v2

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