Zeeman Effect of the Magnetic Excitations in a Diluted Magnetic Semiconductor: A Raman Scattering Study of Cd1−x Mnx Te

Abstract

The electron paramagnetic transition of a magnetic ion in light scattering is reported. Intense Raman lines are observed corresponding to the $\Delta m_S=\pm 1$ transitions within the Zeeman multiplet of ${\mathrm{Mn}}^{++}$, as well as their combinations with the zone-center longitudinal-optical phonons which interact with band electrons and, in turn, through exchange interaction, with ${\mathrm{Mn}}^{++}$. The phase transition to the magnetically ordered low-temperature phase is manifested in the evolution of the paramagnetic transition into a magnon line.