Possible observation of cycloidal electromagnons in BiFeO3

We unravel the magnon spectra of BiFeO(3) by means of low-energy inelastic light scattering. We show the existence of two species of magnons corresponding to spin wave excitations in and out of the cycloidal plane. These excitations might be interpreted as electromagnon modes. The present observations present an unique opportunity to study the competition between ferroelectric and magnetic orders.