IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Grazing incidence XRF and EXAFS study of ZnFe2O4 thin films
Autor/es:
C.E. RODRÍGUEZ TORRES, S. P. HELUANI, A.M. MUDARRA NAVARRO, F. GOLMAR, M. VILLAFUERTE, M ZIESE, AND P. ESQUINAZI
Lugar:
Campinas
Reunión:
Encuentro; 21ª Reunión Anual de Usuarios del LNLS y CNPEM; 2011
Institución organizadora:
Laboratorio Nacional de Luz Sincrotrón
Resumen:
X-ray absorption near-edge (XANES) and grazing incidence X-ray fluorescence spectroscopy (GI-XRF) are employed to investigate the electronic structure of ZnFe2O4 thin films. The spectroscopy techniques are used to determine the non-equilibrium cation site occupancy as a function of depth and oxygen pressure during deposition and its effects on the magnetic properties. It is found that low deposition pressures below 10-3 mbar cause iron super occupation of tetrahedral sites without Zn2+ inversion, resulting in an ordered magnetic phase with high room temperature magnetic moment.
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