使用单自旋磁强计对薄膜超导体的局域磁响应进行实空间探测。
Real-Space Probing of the Local Magnetic Response of Thin-Film Superconductors Using Single Spin Magnetometry.
机构信息
Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany.
出版信息
Sensors (Basel). 2018 Nov 6;18(11):3790. doi: 10.3390/s18113790.
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.
我们使用扫描单自旋磁力计报告了在高温超导体 YBa₂Cu₃O（YBCO）薄膜微盘上方的杂散磁场的直接、实空间成像。我们的实验直接测量了样品的伦敦穿透深度，并允许对由于迈斯纳屏蔽而在样品中流动的超导电流进行定量重建。这些结果表明了扫描单自旋磁力计在研究薄膜超导体的纳米级磁性质方面的潜力，这可以很容易地扩展到高温或磁场。
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