Low-noise diamond-based D.C. nano-SQUIDs

Bose, Manjith, Creedon, Daniel L., Barlow, Anders, Stuiber, Michael, Klemencic, Georgina M. ORCID: https://orcid.org/0000-0002-2125-9754, Mandal, Soumen ORCID: https://orcid.org/0000-0001-8912-1439, Williams, Oliver ORCID: https://orcid.org/0000-0002-7210-3004, van Riessen, Grant and Pakes, Christopher I. 2022. Low-noise diamond-based D.C. nano-SQUIDs. ACS Applied Electronic Materials 4 (5) , pp. 2246-2252. 10.1021/acsaelm.2c00048

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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 at 1 kHz and a concurrent spin sensitivity of . 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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Chemical Society
ISSN:	2637-6113
Date of First Compliant Deposit:	5 May 2022
Date of Acceptance:	24 March 2022
Last Modified:	08 Nov 2023 08:28
URI:	https://orca.cardiff.ac.uk/id/eprint/149449

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