Title :
Integrated LTS gradiometer SQUID systems for measuring of magnetic field distributions in an unshielded environment
Author :
Weber, P. ; Zakosarenko, V.M. ; Berthel, K.-H. ; Bluthner, K. ; Schambach, J. ; Warzemann, L. ; Kirsch, G. ; Dohler, T. ; Stolz, R.
Author_Institution :
Inst. of Solid State Phys., Friedrich-Schiller-Univ., Jena, Germany
fDate :
6/1/1995 12:00:00 AM
Abstract :
Planar dc SQUID gradiometers with integrated antenna were designed for measurement of field distributions with gradients much smaller than 1 pT/cmHz/sup 1/2/ in an unshielded environment. Four types of first-order-gradiometer SQUIDs were fabricated in Nb-Pb technology and investigated. Their layouts are highly symmetrical and they can be made also with HTS materials. Further reduction of the effect of disturbances was achieved with a second order gradiometer realized electronically. The stable function of the systems under unshielded conditions is shown.<>
Keywords :
Josephson effect; SQUID magnetometers; SQUIDs; lead; magnetic field measurement; magnetometers; niobium; niobium compounds; Nb-NbO-Pb; SQUID systems; first-order-gradiometer SQUIDs; integrated LTS gradiometer; integrated antenna; magnetic field distributions; second order gradiometer; unshielded environment; Antenna measurements; Chemical technology; High temperature superconductors; Inductance; Integrated circuit noise; Magnetic field measurement; Magnetic noise; SQUID magnetometers; Substrates; Superconducting device noise;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
