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Structural, magnetic and Mössbauer spectral studies of nanocrystalline Ni0.5Zn0.5Fe2O4 ferrite powders |
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| Authors: | Seema Verma PA JoySajith Kurian |
| Affiliation: | a Department of Chemistry, Indian Institute of Science Education and Research (IISER), 900, NCL Innovation Park, Dr Homi Bhabha Road, Pune 411 008, India b Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India c Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India |
| Abstract: | Nanocrystalline Ni0.5Zn0.5Fe2O4 powders, synthesized by a combustion method are investigated by X-ray diffraction, vibrating sample magnetometry and Mössbauer spectroscopic techniques. We adopt a strategy to systematically control the particle sizes between 4 and 45 nm simply by changing the elemental stoichiometric coefficient, Φe, of the combustion mixture. Curie temperature of the superparamagnetic particles of size 4 nm is higher than that of the bulk particles. Interestingly, bigger particles (45 nm) show a comparable room temperature saturation magnetization and exceptionally very high Curie temperature of 833 K, when compared to that of the bulk Ni0.5Zn0.5Fe2O4 material (563 K). |
| Keywords: | Nanostructured materials Chemical synthesis Magnetisation Mö ssbauer spectroscopy |
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