  Noncoplanar magnetic states with a scalar spin chirality have been
intensively studied in condensed matter physics, since they exhibit fascinating
physical phenomena. We theoretically propose the generation of such noncoplanar
magnetic states by using a circularly polarized electric field. By performing
the micromagnetic simulation, we investigate a time evolution of a classical
kagome magnet irradiated by the circularly polarized electric field. As a
result, we find that the noncoplanar magnetic states are induced as a
nonequilibrium steady state irrespective of the ground-state spin
configurations. We show that the induced scalar spin chirality is controlled by
the amplitude, frequency, and polarization of the electric field. In addition,
we clarify that the mechanism of the noncoplanar magnetic states is accounted
for by effective field-induced three-spin interactions by adopting the Floquet
formalism in the high-frequency regime. We also show a condition to enhance the
scalar spin chirality. Our results present a new reference for controlling the
noncoplanar magnetic states and related phenomena by the circularly polarized
electric field.
