Anomalous current-voltage characteristics of SFIFS Josephson junctions with weak ferromagnetic interlayers
arXiv:2002.02725 · doi:10.3762/bjnano.11.19
Abstract
We present a quantitative study of the current-voltage characteristics (CVC) of SFIFS Josephson junctions (S denotes bulk superconductor, F - metallic ferromagnet, I - insulating barrier) with weak ferromagnetic interlayers in the diffusive limit. The problem is solved in the framework of the nonlinear Usadel equations. We consider the case of a strong tunnel barrier such that the left SF and the right FS bilayers are decoupled. We calculate the density of states (DOS) in SF bilayers using a self-consistent numerical method. Then we obtain the CVC of corresponding SFIFS junctions, and discuss their properties for different set of parameters including the thicknesses of ferromagnetic layers, the exchange field, and the magnetic scattering time. We observe the anomalous nonmonotonic CVC behavior in case of weak ferromagnetic interlayers, which we ascribe by DOS energy dependencies in case of small exchange fields in F layers.
References in corpus (17)
- Direct coupling between magnetism and superconducting current in Josephson Phi junction
- Beyond Moore's technologies: operation principles of a superconductor alternative
- Half-integer Shapiro steps at the 0-pi crossover of a ferromagnetic Josephson junction
- 0-pi Josephson tunnel junctions with ferromagnetic barrier
- Ferromagnetic Josephson switching device with high characteristic voltage
- High quality ferromagnetic 0 and pi Josephson tunnel junctions
- Josephson tunnel junctions with strong ferromagnetic interlayer
- Striking properties of Superconductor/Ferromagnet structures with spin-dependent scattering
- Static and dynamic properties of 0, pi, and 0-pi ferromagnetic tunnel Josephson Junctions
- Magnetization-control and transfer of spin-polarized Cooper pairs into a half-metal manganite
- Spatially-resolved probing of a non-equilibrium superconductor
- Spin Controlled Coexistence of 0 and π States in SFSFS Josephson Junctions
- Low-T_c Josephson junctions with tailored barrier
- Scattering by magnetic and spin-orbit impurities and the Josephson current in superconductor-ferromagnet-superconductor junctions
- Effective spin-flip scattering in diffusive superconducting proximity systems with magnetic disorder
- Density of states in SF bilayers with arbitrary strength of magnetic scattering
- Cascading Proximity Effects in Rotating Magnetizations