Noise Properties of NbN-MgO-NbN SQUIDs

DC-SQUIDs made of refractive materials NbN-MgO-NbN were prepared using thin film preparation techniques. The noise properties of these SQUIDs were investigated. The white energy sensitivity of typical devices is 600h (8mF0/ÀHz). The measured values are compared with theoretical predictions and the standard optimization rules. The low frequency noise was measured directly and using different modulation schemes. The SQUIDs show a relatively high 1/f noise onset in the range of 100Hz. The main contribution comes from out-of-phase critical current fluctuations and can be effectively suppressed by bias modulation.


Editor(s):
Koch, Dr Hans
Luebbig, Dr Heinz
Published in:
Superconducting Devices and Their Applications, 317-320
Year:
1992
Publisher:
Springer Berlin Heidelberg
ISBN:
978-3-642-77459-1
978-3-642-77457-7
Keywords:
Laboratories:




 Record created 2015-07-07, last modified 2018-05-12


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