Dispersive nanoSQUID magnetometry

We describe the theory and implementation of a dispersive magnetometer based on an aluminum nanoSQUID. The nanoSQUID consists of a superconducting loop interrupted by two variable-thickness weak-link nanobridge Josephson junctions. When the nanoSQUID is placed in parallel with a lumped-element capac...

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Bibliographic Details
Published inSuperconductor science & technology Vol. 29; no. 11; pp. 113003 - 113013
Main Authors Levenson-Falk, E M, Antler, N, Siddiqi, I
Format Journal Article
LanguageEnglish
Published United Kingdom IOP Publishing 26.09.2016
Subjects
dispersive magnetometry
nanobridge junction
nanoSQUID
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Summary:We describe the theory and implementation of a dispersive magnetometer based on an aluminum nanoSQUID. The nanoSQUID consists of a superconducting loop interrupted by two variable-thickness weak-link nanobridge Josephson junctions. When the nanoSQUID is placed in parallel with a lumped-element capacitor, it acts as the inductive element in a resonant tank circuit. By performing microwave reflectometry on the circuit, the SQUID inductance can be measured, providing a sensitive meter of the flux threading the SQUID loop. In this review we provide the theoretical basis for the device, describe design and operation considerations, and present characterization results on several devices.
Bibliography:SUST-101683.R1
USDOE
AC02-05CH11231
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/29/11/113003