The interest of this thesis lies in spin transport in normal metals and superconducting half-metallic junctions. Spin transport is strongly related to the spin polarization (P) of materials. Half... Show moreThe interest of this thesis lies in spin transport in normal metals and superconducting half-metallic junctions. Spin transport is strongly related to the spin polarization (P) of materials. Half-metallic ferromagnets, or half metals, with 100% spin polarization, are of interest as spin injector, promising a high efficiency; but also as a superconducting spin transport channel between two superconducting electrodes, in which spin-poalrized triplets are generated and exist over long distance. Show less