Self-aligned nanoscale SQUID on a tip

Amit Finkler; Yehonathan Segev; Yuri Myasoedov; Michael L. Rappaport; Lior Neeman; Denis Vasyukov; Eli Zeldov; Martin E. Huber; Jens Martin; Amir Yacoby

doi:10.1021/nl100009r

arXiv · 1002.2921

Self-aligned nanoscale SQUID on a tip

Amit Finkler·Yehonathan Segev·Yuri Myasoedov·Michael L. Rappaport·Lior Neeman·Denis Vasyukov·Eli Zeldov·Martin E. Huber·Jens Martin·Amir Yacoby

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Abstract

A nanometer-sized superconducting quantum interference device (nanoSQUID) is fabricated on the apex of a sharp quartz tip and integrated into a scanning SQUID microscope. A simple self-aligned fabrication method results in nanoSQUIDs with diameters down to 100 nm with no lithographic processing. An aluminum nanoSQUID with an effective area of 0.034 $μ$m$^2$ displays flux sensitivity of 1.8$\cdot 10^{-6}$ $Φ_0/\mathrm{Hz}^{1/2} and operates in fields as high as 0.6 T. With projected spin sensitivity of 65 $μ_B/\mathrm{Hz}^{1/2}$ and high bandwidth, the SQUID on a tip is a highly promising probe for nanoscale magnetic imaging and spectroscopy.

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Amit Finkler, Yehonathan Segev, Yuri Myasoedov, Michael L. Rappaport, Lior Neeman, Denis Vasyukov, Eli Zeldov, Martin E. Huber, Jens Martin, Amir Yacoby. 2010-02-15. Self-aligned nanoscale SQUID on a tip. https://doi.org/10.1021/nl100009r

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