https://doi.org/10.1140/epjb/e2005-00359-0
Magnetic susceptibility of d.c. SQUID's
1
INFM and DIIMA, Università degli Studi di Salerno, 84084 Fisciano (SA), Italy
2
Dipartimento di Fisica “E. R. Caianiello”, Università degli Studi di Salerno, 84081 Baronissi (SA), Italy
Corresponding author: a rdeluca@unisa.it
Received:
9
May
2005
Revised:
12
August
2005
Published online:
17
November
2005
We study the magnetic susceptibility of a conventional d.c. SQUID adopting a description based on the reduced two-junction interferometer model. In this context, considering the parameter β as a perturbation parameter, it is possible to derive an analytical expression for magnetic susceptibility with respect to the externally applied magnetic flux. Numerical simulations on the complete model has been carried out in order to confirm the analytical results.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 85.25.Dq – Superconducting quantum interference devices (SQUIDs)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005