An inherent element of research and applications in photonics is a beam of light. In magnonics, which\nis the magnetic counterpart of photonics, where spin waves are used instead of electromagnetic\nwaves to transmit and process information, the lack of a beam source limits exploration. Here, we\npresent an approach enabling generation of narrow spin wave beams in thin homogeneous nanosized\nferromagnetic films by microwave current. We show that the desired beam-type behavior can be\nachieved with the aid of a properly designed coplanar waveguide transducer generating a nonuniform\nmicrowave magnetic field. We test this idea using micromagnetic simulations, confirming numerically\nthat the resulting spin wave beams propagate over distances of several micrometers. The proposed\napproach requires neither inhomogeneity of the ferromagnetic film nor nonuniformity of the biasing\nmagnetic field. It can be generalized to different magnetization configurations and yield multiple spin\nwave beams of different width at the same frequency.
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