ISSN:
1573-4870
Keywords:
Mechanochemistry
;
high-energy milling
;
nanocrystalline metastable material
;
spinel ferrite
;
cation distribution
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The structural and magnetic evolution in nickel ferrite (NiFe2O4) caused by high-energy milling are investigated by Mössbauer spectroscopy. It is found that the nanostructural state of the milled NiFe2O4 is characterized by a reduced concentration of iron ions on tetrahedral sites. The degree of inversion in NiFe2O4 is calculated from the subspectral area ratio of both high- and zero-field Mössbauer spectra. Several interesting features are involved in the work, e.g., superparamagnetic relaxation, mechanically induced cation redistribution, and spin-canting effect.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1011350629436
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