Ballistic hot electrons, whose energy is lower than 2.5 eV, are extracted from a magnetic tunnel junction and injected into a metallic base. After passing through the base, the electrons are energy filtered by a Schottky barrier. The use of a low height Si/Cu Schottky barrier allows to disentangle the different contributions to the scattering. The hot electrons transport is interpreted as being mainly influenced by inelastic diffusion. A transport model reproduces our measurements and explains them as resulting directly from a diffusion process related to the d-band of the ferromagnetic material involved.
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