Transitions between "$\pi$" and "0" states in superconductor -- ferromagnet -- superconductor junctions

Abstract

Experimental and theoretical study of superconductor (S) -- ferromagnet (F) -- superconductor junctions showed that in certain range of parameters (e.g., the length of the ferromagnet $d_F$, the exchange field, $E_{\mathrm{ex}}$) the ground state of a SFS junction corresponds to superconducting phase difference $\pi$ or 0. The phase diagram of a SFS junction with the respect to $\pi$ and 0 states is investigated in this letter in $E_{\mathrm{ex}},d_F,T$ space. It is shown that the phase diagram is very sensitive to the geometry of the system, in particular, to the amount of disorder.

arXiv commentMinor changes. References added

References in corpus (5)

• Quasiclassical Green's function approach to mesoscopic superconductivity
• Josephson currents through spin-active interfaces
• Josephson effect in double-barrier superconductor-ferromagnet junctions
• Interplay of spin-discriminated Andreev bound states forming the 0-$\pi$ transition in Superconductor-Ferromagnet-Superconductor Junctions
• Magnetic Field Effect on the Supercurrent of an SNS junction

Cited by in corpus (4)

• Domain wall effects in ferromagnet-superconductor structures
• Nonsinusoidal current-phase relations and the $0-\pi$ transition in diffusive ferromagnetic Josephson junctions
• Resonant tunneling in short Josephson SFS junctions
• Width of the $0-\pi$ phase transition in diffusive magnetic Josephson junctions