Controllаble Josephson 0–π Junction Based on a Four-Layer Ferromagnetic–Superconductor System (FSFS)

Abstract

© 2020, Pleiades Publishing, Ltd. Abstract: A system containing four alternating ferromagnetic and superconducting layers (F1/S1/F2/S2) is examined in this work. The state of this contact may be controlled by an external magnetic field. The critical temperature of the superconducting transition and the Josephson current are calculated theoretically at different thicknesses and collinear orientations of magnetizations of ferromagnetic layers. It is demonstrated that this F1/S1/F2/S2 system may serve as a controllable Josephson 0–π contact or an inverse spin valve.