Some experimental and theoretical studies on the Mn magnetic moment in Y(Ni1-xMnx)2B2C

The magnetic moment of the Mn impurities was obtained from magnetization measurements of Y(Ni(1-x)Nn(x))(2)B2C as a function of the concentration x less than 0.15. Using the coherent potential approximation and starting from 3d density of states, obtained from the first principles calculations, the magnetic moments are obtained within a two sublattice model. For adequately estimated values of the Coulomb interactions U, the position of the energy level of Mn and adopting values for the intersublattice hybridization term, a qualitative agreement With the observed experimental data is obtained.