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.
@article{arxiv.1712.03723,
title = {Quantitative magneto-optical investigation of superconductor/ferromagnet hybrid structures},
author = {G. Shaw and J. Brisbois and L. B. G. L. Pinheiro and J. Müller and S. Blanco Alvarez and T. Devillers and N. M. Dempsey and J. E. Scheerder and J. Van de Vondel and S. Melinte and P. Vanderbemden and M. Motta and W. A. Ortiz and K. Hasselbach and R. B. G. Kramer and A. V. Silhanek},
journal= {arXiv preprint arXiv:1712.03723},
year = {2018}
}
Comments
21 pages, including 2 pages of supplementary material