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VOLUME 35 (1982) | ISSUE 4 | PAGE 147
Critical-current oscillations as a function of the exchange field and thickness of the ferromagnetic metal (F) in an S-F-S Josephson junction
The Josephson current in an S-F-S junction is calculated for a short weak link. The current amplitude depends in an oscillatory manner on the exchange field of the pure ferromagnetic metal. When certain conditions are satisfied in a superconducting ring with an S-F-S junction, the energy minimum of the system corresponds to the state with spontaneous current and magnetic flux.