Spin-polarised current source

A method of filtering electrons to obtain spin-polarisation of an electron conduction current at the Fermi level of at least 75%, used with a spin-polarised current source, comprising at least:

• a polarised spin injection device comprising at least one electrically conducting substrate of which a first face has magnetic properties and an organic layer comprising a first face, said first face of the organic layer at least partly comprising a set of atoms approximately in the same plane and bonded to each other by atomic bonds parallel to or approximately parallel to the first face of the substrate and being in contact with the first face of the substrate so as to form a filtering interface for the polarised spin injection device;
• an electrically conducting material for ground, arranged facing the organic layer such that the organic layer is located between the ground and the substrate;
• a current source electrically connected to the first face of the substrate and the ground;
• the method comprising circulation of the electron conduction current by means of the current source, between the first face of the substrate and the ground, the spin-polarised current source being exposed to a temperature higher than −220° C.