Magneto-optical properties in diluted magnetic semiconductors Cd0.65-yMn0.35NiyTe single crystals

We investigated the magneto-optical properties of diluted magnetic semiconductor Cd0.65-yMn0.35NiyTe single crystals grown using a vertical Bridgman method. This material crystallizes in the zinc-blende structure for values of y < 0.06. The fundamental enegy gap was increased and the lattice constant was decreased showing inverse relationship with the band gap energy with increasing Ni contents. The Verdet constant increased with increasing y, which is consistent with behavior of the magnetization. The Faraday rotation in Cd0.65-yMn0.35NiyTe crystals was increased as Ni contents was increased, which is due to the increasing of magnetization with Ni contents.