A Strategy for Fitting a Three Parameter Model of Charge Transport in Ferromagnetic/Superconductor Point Contacts

We study charge transport in ferromagnet/superconductor point contacts that exhibit effects of spin polarization (P), interface elastic scattering (Z), and bulk inelastic scattering ($\Gamma$). We demonstrate a strategy to extract values for P, Z and $\Gamma$ from conductance data, as a function of temperature. The resulting parameter set can then be used to fit a model that describes charge transport in this type of point contact. Experimental examples will be presented.