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

Details Transitions between "$π$" and "0" states in superconductor -- ferromagnet -- superconductor junctions Transitions between "$π$" and "0" states in superconductor -- ferromagnet -- superconductor junctions

2004-11-14

arxiv.org/abs/cond-mat/0411367v2

JETP Letters, Vol. 80, No. 12, 2004, pp. 743--747. [Pis'ma v Zh. \'Eksp. i Teor. Fiz., Vol. 80, No. 12, 2004, pp. 875--879.]

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Minor changes. References added

Scientific paper

10.1134/1.1868798

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, $E_{\rm ex}$) 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 $E_{\rm ex}, d_{F}, T$ space. It is shown that the phase diagram is very sensitive to the geometry of the system, in particular, to the amount of disorder.

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