Scanning tunneling spectroscopy of the superconducting proximity effect in a diluted ferromagnetic alloy
L. Crétinon, A. K. Gupta, H. Sellier, F. Lefloch, M. Fauré, A. Buzdin, H. Courtois
DOI 10.1103/PhysRevB.72.024511 · Physical Review B
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Abstract
We studied the proximity effect between a superconductor (Nb) and a diluted ferromagnetic alloy (CuNi) in a bilayer geometry. We measured the local density of states on top of the ferromagnetic layer, where thickness varies on each sample, with a very low temperature scanning tunneling microscope. The measured spectra display a very high homogeneity. The analysis of the experimental data shows the need to take into account an additional scattering mechanism. By including in the Usadel equations the effect of the spin relaxation in the ferromagnetic alloy, we obtain a good description of the experimental data.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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