Low-Noise Diamond-Based D.C. Nano-SQUIDs
Source abstract
Abstract
Nanoscale superconducting quantum interference devices (nano-SQUIDs) with Dayem bridge junctions and a physical loop size of 50 nm have been engineered in boron-doped nanocrystalline diamond films using precision Ne-ion beam milling. In an unshunted device, the nonhysteretic operation can be maintained in an applied field exceeding 0.1 T with a high flux-to-voltage transfer function, giving a low flux noise ϕnoise=0.14μϕ0/Hz at 1 kHz and a concurrent spin sensitivity of 11spins/Hz. At elevated magnetic fields, up to 2 T, flux modulation of the nano-SQUID output voltage is maintained but with an increase in period, attributed to an additional phase bias induced on the nano-SQUID loop by up to 16 vortices per period penetrating the nano-SQUID electrodes.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Diamond and Carbon-based Materials Research · Electronic and Structural Properties of Oxides · Physics of Superconductivity and Magnetism
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry and Physics, La Trobe University, Bundoora, Victoria 3086, Australia
School of Physics, The University of Melbourne, Melbourne, Victoria 3010, Australia
Materials Characterisation and Fabrication Platform, The University of Melbourne, Melbourne, Victoria 3010, Australia
Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, Victoria 3168, Australia
School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, United Kingdom
Funding
Australian Research Council
References (37)
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