This paper describes current transport through а long Josephson junction with an alternating critical–current density. This alternating density can be achieved in experiments bу incorporating a magnetic layer to the weak link in а special manner. The prospects for the practical use of such structures are related to the possibility of obtaining bistable Josephson elements on their basis. Joint analysis of both current–phase relations and dynamic characteristics made it possible to optimize the operation mode for a fast superconducting memory cell based on bistable contact and to assess the energy dissipation for the read and write operations.
85.25.Hv Superconducting logic elements and memory devices; microelectronic circuits
85.25.Cp Josephson devices
$^1$Department of Physics, Moscow State University, Moscow, 119991 Russia $2$Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991 Russia
$^3$Lukin Scientific Research Institute of Physical Problems, Zelenograd, Moscow, 124460 Russia