A Terraced Scanning Superconducting Quantum Interference Device Susceptometer with Sub-Micron Pickup Loops

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dc.creatorKoshnick, Nicholas C.
dc.creatorHuber, Martin E.
dc.creatorBert, Julie A.
dc.creatorHicks, Clifford W.
dc.creatorLarge, Jeff
dc.creatorEdwards, Hal
dc.creatorMoler, Kathryn A.
dc.date2009-01-03
dc.date.accessioned2026-07-07T12:24:29Z
dc.date.available2026-07-07T12:24:29Z
dc.descriptionSuperconducting Quantum Interference Devices (SQUIDs) can have excellent spin sensitivity depending on their magnetic flux noise, pick-up loop diameter, and distance from the sample. We report a family of scanning SQUID susceptometers with terraced tips that position the pick-up loops 300 nm from the sample. The 600 nm - 2 um pickup loops, defined by focused ion beam, are integrated into a 12-layer optical lithography process allowing flux-locked feedback, in situ background subtraction and optimized flux noise. These features enable a sensitivity of ~70 electron spins per root Hertz at 4K.
dc.descriptionSee http://stanford.edu/group/moler/publications.html for an auxiliary document containing additional fabrication details and discussion
dc.identifierhttps://arxiv.org/abs/0901.0308
dc.identifierhttp://arxiv.org/abs/0901.0308
dc.identifierAppl. Phys. Lett. 93, 243101 (2008)
dc.identifierdoi:10.1063/1.3046098
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214339
dc.subjectSuperconductivity
dc.titleA Terraced Scanning Superconducting Quantum Interference Device Susceptometer with Sub-Micron Pickup Loops
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