Magnetic properties of a pair of V4 interacting clusters in a Fe matrix.
The magnetic properties of a pair V4 atomic clusters embedded in bulk Fe are determined by using a realistic spd-band Hubbard-like model. The spin density distribution is calculated self-consistenly in the unrestricted Hartree-Fock approximation. The local magnetic moments mu(i) are obtained at various atoms i of the cluster and of the surrounding Fe matrix. We consider two different geometrical arrangements for V clusters, collinear (C) and non-collinear (NC). In all the cases studied the magnetic coupling in the interface cluster-matrix is antiferromagnetic, and the ferromagnetic order of the matrix is not broken by the presence of the V atoms, although the local magnetic moments of Fe atoms at the interface cluster-matrix, are reduced respect to Fe bulk magnetization (2.22 microB) about 8%-20%. We compare the results with those of just one V4 atomic cluster embedded in bulk Fe.
Montejano-Carrizales
J M
JM
Instituto de Fisica "Manuel Sandoval Vallarta, Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, Alvaro Obregón 64, 78000 San Luis Potosí, S.L.P, México.
Alvarado-Leyva
P G
PG
Sosa-Hernandez
E M
EM