Experimental observations of optical spin transfer and spin-orbit torques in magnetic semiconductors

Abstract

The spin transfer and spin-orbit torques can be used for electrically driven magnetization dynamics. Here, we report on the experimental observation of the optical counterparts of these torques which lead to a sub-picosecond tilt of magnetization and, consequently, to the magnetization precession in (Ga,Mn)As.

Keywords

• ferromagnetic semiconductor
• magneto-optical spectroscopy