Magneto-optical studies of Cd1−x−yMnxCoyTe

Abstract

We have investigated the optical absorption and magneto-optical properties of quaternary Cd1-x−yMnxCoyTeCd1-x−yMnxCoyTe crystals (x=0.37x=0.37, 0≤y≤0.0090≤y≤0.009) grown by the vertical Bridgman method. The presence of Co showed a significant enhancement of magneto-optical effects as compared to ternary Cd0.63Mn0.37TeCd0.63Mn0.37Te system with the same Mn content. Four features were observed in magnetic circular dichroism (MCD) spectra of these alloys, located near 1.37, 1.45, 1.82, and 2.13 eV. We present detailed temperature dependences of the position and intensity of these MCD features, and we discuss their possible origins.