Results on the temperature and magnetic field dependence of current-voltage characteristics (CVC) are presented for SNS-type 2D ordered array of Nb-Cu0.95Al0.05-Nb junctions. The critical current IC (T, H) and the power exponent a (T, H) = 1 + Φ0 IC (T, H) / 2 kB T of the nonlinear CVC law V = R [I - IC (T, H)]a (T, H) are found to have a maximum at non-zero value of applied magnetic field Hp = 225 Oe, which is attributed to manifestation of π-type Josephson contacts in our sample.
|Number of pages||4|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|State||Published - 28 Dec 2009|
Bibliographical noteFunding Information:
We are very grateful to R.S. Newrock, P. Barbara and C.J. Lobb for helpful discussions and for providing SNS samples. This work has been financially supported by the Brazilian agencies CNPq, CAPES and FAPESP.
- Current-voltage characteristics
- Josephson junction arrays
- Proximity effect
- π-type Josephson contacts