Articulo
Experimental and ab initio study of the hyperfine parameters of ZnFe2O4 with defects
Registro en:
issn:0304-3843
issn:1572-9540
Autor
Melo Quintero, Jhon Jaither
Salcedo Rodríguez, Karen Lizeth
Pasquevich, Gustavo Alberto
Mendoza Zélis, Pedro
Stewart, Silvana Jacqueline
Rodríguez Torres, Claudia Elena
Errico, Leonardo Antonio
Institución
Resumen
We present a combined Mossbauer and ab initio study on the influence of oxygen-vacancies on the hyperfine and magnetic properties of the ZnFe 2O4 spinel ferrite. Samples with different degree of oxygen-vacancies were obtained from zinc ferrite powder that was thermally treated at different temperatures up to 650 ∘C under vacuum.Theoretical calculations of the hyperfine parameters, magnetic moments and magnetic alignment have been carried out considering different defects such as oxygen vacancies and cation inversion. We show how theoretical and experimental approaches are complementary to characterize the local structure around Fe atoms and interpret the observed changes in the hyperfine parameters as the level of defects increases. Instituto de Física La Plata