Effect of magnetic field on optical and electronic properties of doped CdxMn1-xTe semimagnetic semiconductor

In this work the polarized far infrared magnetoplasmon reflectivity of semimagnetic semiconductor Cd_xMn_1-xTe doped ternary alloy in the presence of magnetic field parallel to surface of sample (Voigt geometry) are used to investigate magnetoplasma and optical phonon properties. It assumed that the sample is characterized by a magnetoplasma dielectric tensor which the optical phonon contribution and free carriers (plasmon and cyclotron response) were included. The far infrared reflection spectra for S-polarization ray are independent from magnetic field, so, the p-polarized reflection spectra are interesting case to investigate. The results show the transverse optical phonon mode are sensitive to the alloy composition, x, and can be used to determine, x, value. Also, we can used from data obtain from reflectivity of Cd_xMn_1-xTe and dependence of cyclotron and plasmon frequencies to effective mass and carrier concentration to determine the effective mass and carrier concentration of both species of carriers in the samples.