Scanning Tunneling Spectroscopy of the superconducting proximity effect in a diluted ferromagnetic alloy

Details Scanning Tunneling Spectroscopy of the superconducting proximity effect in a diluted ferromagnetic alloy Scanning Tunneling Spectroscopy of the superconducting proximity effect in a diluted ferromagnetic alloy

2005-02-02

arxiv.org/abs/cond-mat/0502050v2

Phys. Rev. B 72, 024511 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.72.024511

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, which 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.

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