ISSN:
0392-6737
Keywords:
Mössbauer spectra
;
Magnetism in interface structures (including layer and superlattice structures)
;
Superface and interface chemistry
;
Conference proceedings
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Summary Surface chemical states of57Co2+ and119Sb5+ ions adsorbed on γ-Fe2O3 and NiFe2O4 were studied in the presence of the aqueous phase using the magnetic interaction between the substrates and57Fe2+ or119Sn4+ arising from the adsorbed species. Two chemical forms were observed for the57Co2+ adsorbed on γ-Fe2O3; one giving a peak in the high-field region and another giving a broad distribution in the lower fields, which were attributed to57Co2+ at surfaceB sites of the spinel structure of γ-Fe2O3 and57Co2+ species weakly bonded to the substrate, respectively. In case of the NiFe2O4 substrate, the latter species was dominant and was converted to the former by heating. Most of the119Sb5+ ions adsorbed on the γ-Fe2O3 and NiFe2O4 particles were found to have a certain magnetic interaction with the magnetically ordered ions of the substrates.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02458910
