Theoretical description of the ferromagnetic $\pi$-junctions near the critical temperature

Abstract

The theory of ferromagnetic Pi-junction near the critical temperature is presented. It is demonstrated that in the dirty limit the modified Usadel equation adequately describes the proximity effect in ferromagnets. To provide the description of an experimentally relevant situation, oscillations of the Josephson critical current are calculated as a function of ferromagnetic layer thickness for different transparencies of the superconductor-ferromagnet interfaces.

12 pages, 4 figures, submitted to Phys. Rev. B

References in corpus (4)

• Josephson current in superconductor-ferromagnet structures with a nonhomogeneous magnetization
• Oscillations of the superconducting critical current in Nb-Cu-Ni-Cu-Nb junctions
• Nonmonotonic critical temperature in superconductor/ferromagnet bilayers
• Local density of states in superconductor-strong ferromagnet structures

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• Singlet-triplet conversion and the long-range proximity effect in superconductor-ferromagnet structures with generic spin dependent fields
• High quality ferromagnetic 0 and pi Josephson tunnel junctions
• Re-entrant superconductivity in Nb/Cu(1-x)Ni(x) bilayers
• Superconducting proximity effect in a diffusive ferromagnet with spin-active interfaces
• Layered ferromagnet-superconductor structures: the $\pi$ state and proximity effects
• Properties of tunnel Josephson junctions with a ferromagnetic interlayer
• Reentrant superconductivity in superconductor/ferromagnetic-alloy bilayers
• Josephson current in a superconductor-ferromagnet junction with two non-collinear magnetic domains
• Interaction of Josephson and magnetic oscillations in Josephson tunnel junctions with a ferromagnetic layer
• Controllable pi junction in a Josephson quantum-dot device with molecular spin
• Magnetoanisotropic Josephson effect due to interfacial spin-orbit fields in superconductor/ferromagnet/superconductor junctions
• Thermodynamics and Phase Diagrams of layered superconductor/ferromagnet nanostructures
• Josephson Coupling and Fiske Dynamics in Ferromagnetic Tunnel Junctions
• The effect of normal metal layers in ferromagnetic Josephson junctions
• Spin-orbital coupling effect on Josephson current through a superconductor heterojunction
• Long ranged singlet proximity effect in ferromagnetic nanowires
• Role of magnetic scattering in 0-pi transitions in a superconductor/ferromagnetic metal/superconductor junction
• Josephson current and density of states in proximity circuits with s+- superconductors
• The physics of superconductor-ferromagnet hybrid structures
• Ferromagnetism of electron gas
• Josephson current and $\pi -$state in ferromagnet with embedded superconducting nanoparticles