Real-Space Probing of the Local Magnetic Response of Thin-Film Superconductors Using Single Spin Magnetometry

We report on direct, real-space imaging of the stray magnetic field above a micro-scale disc of a thin film of the high-temperature superconductor YBa₂Cu₃O (YBCO) using scanning single spin magnetometry. Our experiments yield a direct measurement of the sample's London penetration depth and all...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2018-11, Vol.18 (11), p.3790
Main Authors: Rohner, Dominik, Thiel, Lucas, Müller, Benedikt, Kasperczyk, Mark, Kleiner, Reinhold, Koelle, Dieter, Maletinsky, Patrick
Format: Article
Language:English
Subjects:
Letter
london penetration depth
meissner effect
nitrogen-vacancy center
quantum sensing
scanning probe microscopy
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Summary:We report on direct, real-space imaging of the stray magnetic field above a micro-scale disc of a thin film of the high-temperature superconductor YBa₂Cu₃O (YBCO) using scanning single spin magnetometry. Our experiments yield a direct measurement of the sample's London penetration depth and allow for a quantitative reconstruction of the supercurrents flowing in the sample as a result of Meissner screening. These results show the potential of scanning single spin magnetometry for studies of the nanoscale magnetic properties of thin-film superconductors, which could be readily extended to elevated temperatures or magnetic fields.
ISSN:1424-8220
1424-8220
DOI:10.3390/s18113790