Finkler, AmitSegev, YehonathanMyasoedov, YuriRappaport, MichaelNe'eman, LiorVasyukov, DenisZeldov, EliMartin, JensHuber, MartinYacoby, Amir2012-01-242010Finkler, Amit, Yehonathan Segev, Yuri Myasoedov, Michael L. Rappaport, Lior Ne'eman, Denis Vasyukov, Eli Zeldov, Martin Huber, Jens Martin, and Amir Yacoby. 2010. Self-aligned nanoscale SQUID on a tip. Nano Letters 10(3): 1046–1049.1530-6992http://nrs.harvard.edu/urn-3:HUL.InstRepos:8015280A 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 \(0.034 \mu m^2\) displays flux sensitivity of \(1.8 \times 10^{−6} \phi_0/Hz^{\frac {1}{2}}\) and operates in fields as high as \(0.6 T\). With projected spin sensitivity of \(65 \mu_B/Hz^{\frac {1}{2}}\) and high bandwidth, the SQUID on a tip is a highly promising probe for nanoscale magnetic imaging and spectroscopy.en-USsuperconductivitymesoscale and nanoscale physicsSQUIDmicroscopyspindetectionscanningJournal Article2012-01-2410.1021/nl100009r