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

• URL: http://arxiv.org/abs/2304.01024v2
• Date: Tue, 24 Oct 2023 06:06:29 GMT
• Title: Wide-field quantitative magnetic imaging of superconducting vortices using perfectly aligned quantum sensors
• Authors: Shunsuke Nishimura, Taku Kobayashi, Daichi Sasaki, Takeyuki Tsuji, Takayuki Iwasaki, Mutsuko Hatano, Kento Sasaki, and Kensuke Kobayashi
• Abstract summary: 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. The obtained vortex shape is consistent with the theoretical model, and penetration depth and its temperature dependence agree with previous studies.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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 $\pm10~\%$. 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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