High Sensitivity Magnetic Flux Sensors with Direct Voltage Readout Double Relaxation Oscillation SQUIDs

Adelerhof, D.J. and Duuren van, M.J. and Flokstra, J. and Rogalla, H. and Kawai, J. and Kado, H. (1995) High Sensitivity Magnetic Flux Sensors with Direct Voltage Readout Double Relaxation Oscillation SQUIDs. IEEE Transactions on Applied Superconductivity, 5 (2 , Pa). pp. 2160-2163. ISSN 1051-8223

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Abstract:	The experimental sensitivity of double relaxation oscillation SQUIDs (DROSs) has been compared with theory and with the results obtained by numerical simulations. The experimental sensitivity ranges from 60 to 13h, where h is Planck's constant, for relaxation frequencies from 0.4 up to 10 GHz. For low frequencies the DROS characteristics can be explained by thermal noise on the critical currents. For high frequencies, the voltage-flux characteristics and the sensitivity are limited by the plasma frequency. The cross-over frequency is at 2 GHz, which is about 2% of the plasma frequency of the DROSs
Item Type:	Article
Copyright:	©1995 IEEE
Faculty:	Science and Technology (TNW)
Research Group:	Low Temperatures - Biomagnetism (LT)
Link to this item:	http://purl.utwente.nl/publications/24239
Official URL:	http://dx.doi.org/10.1109/77.403011
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