Enhancement of magnetic properties in hard/soft CoFe2O4/Fe3O4 nanocomposites
| Autor: | Qingzi Zeng, Shengbin Yang, Dongmei Jiang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Nanocomposite Scanning electron microscope General Chemical Engineering Spinel Analytical chemistry 02 engineering and technology General Chemistry Coercivity engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Transmission electron microscopy Remanence 0103 physical sciences engineering Ferrite (magnet) Inductively coupled plasma 0210 nano-technology |
| Zdroj: | RSC Advances. 6:46143-46148 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra02993k |
| Popis: | CoFe2O4/Fe3O4 nanocomposites with different concentrations of soft ferrite (Fe3O4) were fabricated using a co-precipitation method. Crystal structure, phase composition, morphology and magnetic properties of as-synthesized nanocomposites were characterized by X-ray diffraction (XRD), inductively coupled plasma (ICP), Mossbauer spectroscopy (MS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). Results from XRD and MS reveal that the nanocomposites are composed of two phases (CoFe2O4 and Fe3O4), both of which have a spinel structure. SEM and TEM show that the average particle size of the nanocomposites is about 20 nm. VSM indicates that all hysteresis loops exhibit a single-phase-like behaviour. The remanence ratio (Mr/Ms), coercivity (Hc) and maximum magnetic energy product (BH)max are significantly enhanced in all the nanocomposites compared with pure hard ferrite (CoFe2O4). The enhancement of the magnetic properties may be attributed to the exchange coupling interaction in the system. |
| Databáze: | OpenAIRE |
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