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arXiv · 1905.09193

Competitive 0 and π states in S/F multilayers: multimode approach

T. Karabassov·V. S. Stolyarov·A. A. Golubov·V. M. Silkin·V. M. Bayazitov·B. G. Lvov·A. S. Vasenko
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Abstract

We have investigated the critical temperature behavior in periodic superconductor/ ferromagnet (S/F) multilayers as a function of the ferromagnetic layer thickness $d_f$ and the interface transparency. The critical temperature $T_c(d_f)$ exhibits a damped oscillatory behavior in these systems due to an exchange field in the ferromagnetic material. In this work we have performed $T_c$ calculations using the self-consistent multimode approach, which is considered to be exact solving method. Using this approach we have derived the conditions of 0 or $π$ state realization in periodic S/F multilayers. Moreover, we have presented the comparison between the single-mode and multimode approaches and established the limits of applicability of the single-mode approximation, frequently used by experimentalists.

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T. Karabassov, V. S. Stolyarov, A. A. Golubov, V. M. Silkin, V. M. Bayazitov, B. G. Lvov, A. S. Vasenko. 2019-05-23. Competitive 0 and π states in S/F multilayers: multimode approach. https://doi.org/10.1103/physrevb.100.104502

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