Magnetoelectric effect in visible light range due to ferroic order of magnetoelectric-active multipole moments

Abstract of Tsuyoshi Kimura

The magnetoelectric (ME) effect is a cross-coupling phenomenon between electricity and magnetism, in which electric polarization (magnetization) is induced by a static magnetic field (electric field). The optical magnetoelectric (OME) effect is an extension of the ME effect to the frequency region, that is, the ME effect induced by an oscillating electric or magnetic field of electromagnetic wave. From the symmetry point of view, both the space-inversion and time-reversal symmetries must be broken for the presence of the linear (O)ME effect which can cause nonreciprocal light propagation. In this presentation, we deal with ME active multipole moments which break both the time reversal and the space inversion and result in ME activity as well as nonreciprocal light propagation. Examples of such multipole moments are magnetic toroidal and magnetic quadrupole moments. We introduce our strategy of how to embed such multipole moments in materials and show our study on the OME effects in visible light range due to ferroic order of these multipole moments.

This work was done in collaboration with K. Kimura (U. Tokyo), T. Katsuyoshi (U. Tokyo), Y. Yamaguchi (Osaka U.), Y. Araya (Osaka U.), Y. Sawada (Osaka U.), S. Kimura (Tohoku U.), and T. Arima (Univ. of Tokyo).


Tsuyoshi Kimura, Department of Advanced Materials Science, University of Tokyo, Kashiwa, Japan