Wide-field quantitative magnetic imaging of superconducting vortices using perfectly aligned quantum sensors

Abstract

Various techniques have been applied to visualize superconducting vortices, providing clues to their electromagnetic response. Here, we present a wide-field, quantitative imaging of the stray field of the vortices in a superconducting thin film using perfectly aligned diamond quantum sensors. Our analysis, which mitigates the influence of the sensor inhomogeneities, visualizes the magnetic flux of single vortices in YBa${}_2$Cu${}_3$O${}_{7-\delta }$ with an accuracy of $\pm 10\%$. The obtained vortex shape is consistent with the theoretical model, and penetration depth and its temperature dependence agree with previous studies, proving our technique's accuracy and broad applicability. This wide-field imaging, which in principle works even under extreme conditions, allows the characterization of various superconductors.

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Cited by in corpus (8)

• Towards high spatial resolution magnetic imaging with a compact practical quantum diamond microscope
• Imaging the Meissner Effect and Flux Trapping of Superconductors under High Pressure using N-V Centers
• Nanodiamond quantum thermometry assisted with machine learning
• Systematic characterization of nanoscale $h$-BN quantum sensor spots created by helium-ion microscopy
• Flux-trapping characterization for superconducting electronics using a cryogenic widefield N-$V$ diamond microscope
• Low-field all-optical detection of superconductivity using NV nanodiamonds
• Widefield NV Magnetic Field Reconstruction for Probing the Meissner Effect and Critical Current Density under Pressure
• Investigations of optical aberration on quantum diamond microscopy toward high spatial resolution and sensitivity