Giant Mutual Proximity Effects in Ferromagnetic/Superconducting Nanostructures

V. T. Petrashov; I. A. Sosnin; I. Cox; A. Parsons; C. Troadec

doi:10.1103/PhysRevLett.83.3281

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Giant Mutual Proximity Effects in Ferromagnetic/Superconducting Nanostructures

V. T. Petrashov, I. A. Sosnin, I. Cox, A. Parsons, C. Troadec

DOI 10.1103/PhysRevLett.83.3281 · Physical Review Letters

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Abstract

A strong mutual influence of superconductors (S) and ferromagnetic (F) conductors in hybrid F/S ( Ni/Al) nanostructures is observed. The proximity-induced conductance on the F side, ΔG, is 2 orders of magnitude larger than that predicted by theory. A crossover from positive to negative ΔG takes place upon an increase in the F/S interface barrier resistance. Reentrance of the superconductors to the normal state reciprocated by changes on the F side has been found in low applied magnetic fields with new peaks in the differential resistance as an effect of the saturation magnetization. An analysis has been developed providing a base for a numerical description of the system.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	Pressure not reported	onset