Exchange constants and transfer integrals of spinel ferrites
PG Bercoff, HR Bertorello - Journal of magnetism and magnetic materials, 1997 - Elsevier
PG Bercoff, HR Bertorello
Journal of magnetism and magnetic materials, 1997•ElsevierWe have studied Fe3O4, CoFe2O4, NiFe2O4 and CuFe2O4 considering Néels two-
sublattice collinear model and the superexchange theory. We have found that, for this theory
to be valid, the interaction between ions in tetrahedral sites should be very weak, and we
have proposed a model to find the constants JAB and JBB with the assumption that JAA= 0.
Using this model, the calcuted values of these constants follow the expected tendencies for
the four systems under study, as well as the ion-to-ion constants of Anderson's theory which …
sublattice collinear model and the superexchange theory. We have found that, for this theory
to be valid, the interaction between ions in tetrahedral sites should be very weak, and we
have proposed a model to find the constants JAB and JBB with the assumption that JAA= 0.
Using this model, the calcuted values of these constants follow the expected tendencies for
the four systems under study, as well as the ion-to-ion constants of Anderson's theory which …
We have studied Fe3O4, CoFe2O4, NiFe2O4 and CuFe2O4 considering Néels two-sublattice collinear model and the superexchange theory. We have found that, for this theory to be valid, the interaction between ions in tetrahedral sites should be very weak, and we have proposed a model to find the constants JAB and JBB with the assumption that JAA = 0. Using this model, the calcuted values of these constants follow the expected tendencies for the four systems under study, as well as the ion-to-ion constants of Anderson's theory which we obtained through the assessment of the transfer integrals.
Elsevier
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