Artículos de revistas
Sublattice magnetism in sigma-phase Fe(100-x)Vx (x=34.4, 39.9, and 47.9) studied via zero-field (51)V NMR
Fecha
2010Registro en:
PHYSICAL REVIEW B, v.81, n.18, 2010
1098-0121
10.1103/PhysRevB.81.184407
Autor
DUBIEL, Stanislaw M.
TOZONI, Jose Roberto
CIESLAK, Jakub
BRAZ, Daniel Cesar
VIDOTO, Edson Luiz Gea
BONAGAMBA, Tito Jose
Institución
Resumen
The successful measurements of a sublattice magnetism with (51)V NMR techniques in the sigma-phase Fe(100-x)V(x) alloys with x=34.4, 39.9, and 47.9 are reported. Vanadium atoms, which were revealed to be present on all five crystallographic sites, are found to be under the action of the hyperfine magnetic fields produced by the neighboring Fe atoms, which allow the observation of (51)V NMR signals. Their nuclear magnetic properties are characteristic of a given site, which strongly depend on the composition. Site A exhibits the strongest magnetism while site D is the weakest. The estimated average magnetic moment per V atom decreases from 0.36 mu(B) for x=34.4 to 0.20 mu(B) for x=47.9. The magnetism revealed at V atoms is linearly correlated with the magnetic moment of Fe atoms, which implies that the former is induced by the latter.