Slotted high-Tc dc SQUID magnetometers

Share/Save/Bookmark

Jansman, A.B.M. and Izquierdo, M. and Flokstra, J. and Rogalla, H. (1999) Slotted high-Tc dc SQUID magnetometers. IEEE Transactions on Applied Superconductivity, 9 (2, Par). pp. 3290-3293. ISSN 1051-8223

open access
[img]
Preview
PDF
376kB
Abstract:Recently, it was observed that the low frequency noise of slotted SQUIDs is not affected when cooling them down in magnetic fields up to 0.05 mT. This behavior is ascribed to the fact that magnetic vortices are expelled out of the narrow strips into the slots. Thus 1/f noise by hopping of vortices in the superconducting structure is eliminated. Here we present a systematic investigation on a series of slotted high-Tc dc SQUIDs. The number of slots varies from zero to eight. A model is developed that provides values for the effective area and inductance of the slotted washers and the current distribution within the slotted SQUIDs. The model can explain the experimentally observed maximum in the effective area for four slots very well. The observed agreement with respect to the modulation depth supports the theoretical values for the inductance. The white noise of the slotted SQUIDs is higher than expected, while the expected rise of low frequency noise for field cooled solid washer SQUIDs was not observed
Item Type:Article
Copyright:©1999 IEEE
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/55664
Official URL:http://dx.doi.org/10.1109/77.783732
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 128776