Chemical charge neutrality coupled to low temperature magnetic measurements method to estimate the cationic distribution for spinel ferrites
| Autor: | Mohamed Saidani, W. Belkacem, Najeh Mliki |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Spinel Metals and Alloys Cationic polymerization Analytical chemistry Nanoparticle chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Magnetocrystalline anisotropy 01 natural sciences Grain size Nuclear magnetic resonance Octahedron chemistry Mechanics of Materials 0103 physical sciences Mössbauer spectroscopy Materials Chemistry engineering 0210 nano-technology Cobalt |
| Zdroj: | Journal of Alloys and Compounds. 729:1177-1182 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.09.235 |
| Popis: | An easy method based on the chemical charge neutrality and low temperature magnetic measurements is proposed to estimate the cationic distribution of Co x Fe 3-x O 4 (0 3+ cations located in the octahedral B sites has been quantified and found to be increased with x (about 30% for x = 1.5). The results have been compared to the literature and found to be accurate with advance techniques as Neutron powder diffraction and in-field Mossbauer spectroscopy. The validity of our method is discussed: when the grain size is less than 6 nm and when the nanoparticles are in a core-shell structure the method cannot be applied. Furthermore, the dependence of the magnetocrystalline anisotropy on the cobalt content x is related to the evolution of the Co 3+ cations. Our method offers the possibility to calculate the cationic distribution of spinel ferrite systems ones they have the suitable physico-chemical properties. |
| Databáze: | OpenAIRE |
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