Properties of tunnel Josephson junctions with a ferromagnetic interlayer
A.S. Vasenko, A.A. Golubov, M.Yu. Kupriyanov, M. Weides
TL;DR
This paper models and analyzes the behavior of superconductor/ferromagnet/superconductor tunnel junctions, focusing on critical current oscillations and density of states, supported by experimental data fitting.
Contribution
It provides a quantitative theoretical model for critical current oscillations and density of states in SIFS Josephson junctions, validated by experimental data.
Findings
Critical current oscillates with ferromagnetic layer thickness.
Density of states exhibits oscillatory behavior similar to critical current.
Model accurately fits recent experimental measurements.
Abstract
We investigate superconductor/insulator/ferromagnet/superconductor (SIFS) tunnel Josephson junctions in the dirty limit, using the quasiclassical theory. We formulate a quantitative model describing the oscillations of critical current as a function of thickness of the ferromagnetic layer and use this model to fit recent experimental data. We also calculate quantitatively the density of states (DOS) in this type of junctions and compare DOS oscillations with those of the critical current.
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