Electromagnons in Multiferroics(Current Topics)

Abstract

We will discuss a recent progress of the theoretical research on the electromagnon, i.e., magnon activated by the electric field of light in multiferroics. Owing to the large energy scale of electric field relative to that of magnetic field, the electromagnon can be intensely excited in contrast to the usual magnetically activated magnon. As one of the interesting phenomena associated with the intense electromagnon excitation, we will introduce a recent theoretical proposal of the fast manipulation of the spin chirality in multiferroics by irradiating an optical pulse with THz frequency.