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. 2010 Mar 10;10(3):1046-9.
doi: 10.1021/nl100009r.

Self-aligned nanoscale SQUID on a tip

Amit Finkler  1 , Yehonathan Segev, Yuri Myasoedov, Michael L Rappaport, Lior Ne'eman, Denis Vasyukov, Eli Zeldov, Martin E Huber, Jens Martin, Amir Yacoby
Affiliations

Self-aligned nanoscale SQUID on a tip

Amit Finkler et al. Nano Lett. .

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 microm2 displays flux sensitivity of 1.8 x 10(-6) Phi(0)/Hz(1/2) and operates in fields as high as 0.6 T. With projected spin sensitivity of 65 micro(B)/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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