Bose-Einstein condensation of magnons in magnetic films

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Subject of the project is magnons in a non-equilibrium state, created in a ferromagnet using external pumping. The main goal of the project is experimental observation of the Bose-Einstein-Condensation (BEC) of the magnon gas, i.e., the effect, which has been recently predicted theoretically. The distribution of magnons over the wavevector space and their possible condensation close to a given value of the wavevector will be studied by means of Brillouin light scattering. The utilization of the novel Brillouin light scattering technique with a sensitivity to the phase of magnon, very recently developed by us, allows the determination of the coherence characteristics of the magnon gas and the unambiguous corroboration of the BEC-transition.