Eur. Phys. J. B 25, 307-311 (2002)
https://doi.org/10.1140/epjb/e20020035

Some experimental and theoretical studies on the Mn magnetic moment in Y(Ni_1-xMn_x)₂B₂C

¹ Instituto de Física – UFRGS, Porto Alegre, Brazil
² Departamento de Física – UFSM, Santa Maria, Brazil
³ Centro Brasileiro de Pesquisas Físicas/CNPq, Rua Xavier Sigaud 150, Rio de Janeiro 22290-180, Brazil

Corresponding author: ^a dasilva@ccne.ufsm.br

Received: 23 April 2001
Revised: 29 October 2001
Published online: 15 February 2002

Abstract

The magnetic moment of the Mn impurities was obtained from magnetization measurements of Y(Ni_1-xMn_x)₂B₂C 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.