Experimental verification of contact-size estimates in point-contact spectroscopy on superconductor/ferromagnet heterocontacts

J. Gramich; P. Brenner; C. Sürgers; H. v. Löhneysen; G. Goll

doi:10.1103/PhysRevB.86.155402

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Experimental verification of contact-size estimates in point-contact spectroscopy on superconductor/ferromagnet heterocontacts

J. Gramich, P. Brenner, C. Sürgers, H. v. Löhneysen, G. Goll

DOI 10.1103/PhysRevB.86.155402 · Physical Review B

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Abstract

Nanostructured superconductor/ferromagnet heterocontacts are studied in the different transport regimes of point-contact spectroscopy. Direct measurements of the nanocontact size by scanning electron microscopy allow a comparison with theoretical models for contact-size estimates of heterocontacts. Our experimental data give evidence that size estimates yield reasonable values for the point-contact diameter d as long as the samples are carefully characterized with respect to the local electronic parameters.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.24	Pressure not reported	unknown