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PAGE 122 Selected Applications attoAFM/CFM Quantitative Nanoscale Vortex-Imaging of Superconductors Understanding the microscopic mechanisms of superconductivity could be greatly facilitated by non-invasive tools that allow for quantitative imaging with nanometric resolution over a large range of temperatures and high magnetic fields. Based on the attoAFM/CFM, the group of Patrick Maletinsky (Univ. of Basel) reports on cryogenic measurements using NV center magnetometry. Their technique allows to extract quantitative data on the local magnetic field of individual superconducting vortices in YBCO with high sensitivity and spatial res- olution. By determining the local London penetration depth, they find that the so called Pearl-vortex model explains the data much better and allows for fitting of additional parame- ters than the standard monopole model. Their experiments constitute an impressive example for how far the practical use of the NV center based magnetometry tools has already evolved. Images courtesy of P. Maletinsky, University of Basel, CH; for more details, see L. Thiel et al., “Quantitative nanoscale vortex imaging using a cryogenic quantum magnetometer”, Nature Nanotechnology (2016), doi:10.1038/nnano.2016.63