Effect of super-exchange interaction on ground state magnetic properties of spin-dependent Falicov-Kimball model on a triangular lattice

Abstract

Ground state magnetic properties are studied by incorporating the super-exchange interaction (J se) in the spindependent Falicov-Kimball model (FKM) between localized (f-) electrons on a triangular lattice for half filled case. Numerical diagonalization and Monte-Carlo simulation are used to study the ground state magnetic properties. We have found that the magnetic moment of (d-) and (f-) electrons strongly depend on the value of Hund's exchange (J), superexchange interaction (J se) and also depends on the number of (d-) electrons (N d). The ground state changes from antiferromagnetic (AFM) to ferromagnetic (FM) state as we decrease (N d). Also the density of d electrons at each site depends on the value of J and J se .