Preparation and study of some physical properties of Co–Ni–Li ferrite/polypyrrole nanocomposites
| Autor: | H.F. Abosheiasha, E.H. El-Ghazzawy, S.T. Assar |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nanocomposite
Materials science Mechanical Engineering Metals and Alloys Analytical chemistry 02 engineering and technology Coercivity 010402 general chemistry 021001 nanoscience & nanotechnology Polypyrrole 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Magnetization chemistry Mechanics of Materials Materials Chemistry Magnetic nanoparticles Ferrite (magnet) Fourier transform infrared spectroscopy 0210 nano-technology Saturation (magnetic) |
| Zdroj: | Journal of Alloys and Compounds. 802:553-561 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.06.149 |
| Popis: | Co0.5Ni0.2Li0.15Fe2.15O4/polypyrrole (PPy) nanocomposite samples (PPy wt%: 10, 30, 50%) have been prepared by the mechano-synthesis method. Their structural and magnetic properties have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and the vibrating sample magnetometer (VSM). A linear decrease of saturation Ms, remnant Mr magnetization, and anisotropy constant K1, along with an almost stable value of the coercivity Hc have been found and explained as due to the increase of the non-magnetic PPy shell compared to the magnetic nanoparticles in the core. This also may have played a role in the enhancement of σdc values of the composite samples more than those of the pure PPy and ferrite samples. The frequency dependence of e′, e″, σ′ac and tanδ of the composite samples has been discussed depending on Maxwell–Wagner interfacial polarization. The (Z′-Z″) plots of the composite samples have shown different overlapping parts of semi-circles depending upon the electrical parameters. |
| Databáze: | OpenAIRE |
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