In Nb-based tunnel magnetic Josephson junctions, the critical-current magnetic pattern loses its hysteresis and broadens below 4 K, attributed to full spin screening by the inverse proximity effect, while Al-based junctions keep the standard pattern.
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Evidence of the inverse proximity effect in tunnel magnetic Josephson Junctions
In Nb-based tunnel magnetic Josephson junctions, the critical-current magnetic pattern loses its hysteresis and broadens below 4 K, attributed to full spin screening by the inverse proximity effect, while Al-based junctions keep the standard pattern.