FIELD: physics.
SUBSTANCE: pre-selected working area of a graphene film with a linear dimension of 2000 nm, which is divided into sections having a dimension of 50-100 nm, is subjected to the effect of a pulsed alternating magnetic field with a frequency of 3 terahertz which corresponds to the transition from a ground energy level, corresponding to the non-excited state of spin density, to a fourth working energy level of the excited state of spin density. A spatially localised external magnetic field is generated around the edges of the working area, which resonantly reflects spinons with a working frequency of 0.5-1 terahertz which corresponds to the transition from a third working energy level to a second working energy level of the excited state of spin density, said spinons causing induced coherent radiation of working frequency spin waves as they pass through the working area.
EFFECT: invention enables to increase mean life and propagation length of spin pulses in a graphene film.
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