Dynamics of multiferroic LiCuVO4 influenced by electric field

We present the electron spin resonance study of the influence of an electric field on the low-field multiferroic magnetic state in LiCuVO4. The shift of the magnetic resonance spectra in the electric field has been observed experimentally. Symmetry analysis has been performed in order to describe the static properties of the magnetic system. The low-frequency dynamics of LiCuVO4 in magnetic and electric fields was considered in the framework of the hydrodynamic approach. It was shown that the application of the external electric field leads to the change of the configuration of the magnetic system before and after the spin-flop reorientation. A satisfactory agreement was obtained between the results of experimental studies and theoretical considerations.