The peculiarities of electron transport trough the junction of half-metallic ferromagnetic/insulator/superconductor (HMF/I/S) have been investigated. As spin-polarized electron injector in HMF/I/S junctions, the Co2CrAl films have been employed. Top superconductive layer was Pb. It was observed the significant reduction of the critical tunnel injection current of the HMF/I/S junctions (in comparison with usual S/I/S ones), at which voltage at Pb films appears. As shown, such a reduction did not concern with heating of Pb film or reaching of its critical current density but related to the specifics of the electron injection from half-metallic ferromagnetic to superconductor. For the first time, a recombination time of quasi-particles in non-equilibrium spin-polarized superconducting state is determined.

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