Remagnetization of a ferromagnetic nanoparticle induced by the current of polarized electrons

The theory of change in the magnetic moment of a ferromagnetic nanoparticle under the action of an electric current has been developed. The conditions for the remagnetization of the nanoparticle located between two electrodes one of which is ferromagnetic have been found. It has been shown that the characteristic remagnetization times noticeably depend on the size of the nanoparticle, current, and relaxation time of the spin of an electron in the nanoparticle. A scheme of an experiment for the detection of the effect has been proposed.