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VOLUME 80 | ISSUE 12 | PAGE 875
Transitions between π- and 0-states in superconductor - ferromagnet - superconductor junctions
N. M. Chtchelkatchev
L. D. Landau Institute for Theoretical Physics RAS, 117940 Moscow, Russia
Institute for High Pressure Physics RAS, 142092 Troitsk, Moscow Reg., Russia


PACS: 74.50.+r, 74.80.-g, 75.70.-i
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 dF, the exchange field, E_{\rm ex}) the ground state of the SFS junction corresponds to superconducting phase difference π or 0. The phase diagram of a SFS junction with the respect to π 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 amount of disorder in the junction.


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