National Physical Laboratory

NPL nanoSQUIDs attract more collaboration

NPL nanoSQUIDs are attracting more interest and producing further publications. In collaboration with UCL, members of NPL’s Quantum Detection Group have demonstrated that nanoSQUIDs can have ultra-low noise performance, even in rather high magnetic fields (up to at least 1T). A paper just published in IEEE Transactions on Applied Superconductivity describes the work, that was carried out jointly by NPL and UCL staff working at NPL.

Noise Performance of Niobium Nano-SQUIDs in Applied Magnetic Fields

Edward J. Romans, Sergei Rozhko, Laurence Young, Arnaud Blois, Ling Hao, David Cox and John C. Gallop 

IEEE Tran. Appl. Supercond., 21, 404-407 (2011)

Noise Performance of Niobium Nano-SQUIDs in Applied Magnetic Fields

In a separate collaboration with PTB, NPL nanoSQUIDs have been used in an ultra-sensitive nanomagnetic particle detector. A nanoSQUID acts as the preamplifier for a PTB SQUID Series Array readout.  The combined system operates at liquid helium temperatures (4-8K), achieving a white noise level of only 0.23mFo/Hz1/2 in an applied field of 20mT, and has also been reported in a recent publication:

Readout System for NanoSQUID Sensors Using a SQUID Amplifier

Frank Ruede, Sylke Bechstein, Ling Hao, Cornelia Assmann, Thomas Schurig, John Gallop, Olga Kazakova, Joern Beyer and Dietmar Drung 

IEEE Trans. Appl. Supercond., 21, 408-411 (2011)

Readout System for NanoSQUID Sensors Using a SQUID Amplifier
Last Updated: 15 Dec 2011
Created: 1 Nov 2011

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