The effect of normal and insulating layers on 0-π transitions in Josephson junctions with a ferromagnetic barrierстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 января 2016 г.
Аннотация:Using the Usadel approach, we provide a formalism which allows to calculate the critical current density of 21 different types of Josephson junctions (JJs) with a ferromagnetic (F) barrier and additional insulating (I) or/and normal (N) layers inserted between F-layer and superconducting (S) electrodes. In particular, we obtain that in SFS JJs even a thin additional N-layer between S-layer and F-layer may noticeably change the thickness $\dF$ of the F-layer at which the $0$-$\pi$ transitions occur. For certain values of $\dF$, a $0$-$\pi$ transition can even be achieved by changing only the N-layer thickness. We use our model to fit experimental data of SIFS and SINFS tunnel junctions.