Mechanically Induced Cation Redistribution and Spin Canting in Nickel Ferrite |
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| Authors: | Šepelák V. Baabe D. Becker K. D. |
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| Affiliation: | (1) Institute of Geotechnics, Slovak Academy of Sciences, SK-04353 Ko!["scaron"]("/content/u611h12u50456876/xlarge353.gif") ice, Slovak Republic;(2) Institute of Metal Physics and Nuclear Solid State Physics, Technical University of Braunschweig, D-38106 Braunschweig, Germany;(3) Institute of Physical and Theoretical Chemistry, Technical University of Braunschweig, D-38106 Braunschweig, Germany |
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| 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. |
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| Keywords: | Mechanochemistry high-energy milling nanocrystalline metastable material spinel ferrite cation distribution |
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