La~(3+) doped LiCo_(0.25)Zn_(0.25)Fe_2O_4 spinel ferrite nanocrystals:Insights on structural,optical and magnetic properties |
| |
| Authors: | MIA Abdel Maksoud Ahmed El-Ghandour AH Ashour MM Atta Soraya Abdelhaleem Ahmed H El-Hanbaly Ramy Amer Fahim Said M Kassem MS Shalaby AS Awed |
| |
| Affiliation: | 1. Materials Science Lab., Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt;2. Center Photonics and Smart Materials (CPSM), Zewail City of Science and Technology, October Gardens, 6th of October City, Giza, Egypt;3. Polymers Physics Lab., Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt;4. Egyptian Nuclear and Radiological Regulatory Authority, Cairo, Egypt;5. Radiation Protection and Dosimetry Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Cairo, Egypt;6. Magnetic and Thermal Lab, Solid State & Accelerators Department, National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City, Cairo, Egypt;7. Higher Institute for Engineering and Technology, Manzala, Dakahlia, Egypt |
| |
| Abstract: | This paper addresses the manipulation of structural,morphology,optical and magnetic properties of LiCo_(0.25)Zn_(0.25)Fe_2 O_4 ferrite via incorporation of different proportions of La~(3+) at the expense of iron ions using a sol-gel method.The samples were characterized using the X-ray diffraction technique(XRD),Fourier transform infrared(FT-IR) spectroscopy,the energy dispersive X-ray spectra(EDX),inductively coupled plasma optical emission spectroscopy(ICP-OES),high resolution scanning electron microscopy(SEM),Brunauer-Emmett-Teller(BET) surface area analysis,ultraviolet-diffuse reflectance spectroscopy(UV-DRS),and vibrating sample magnetometer(VSM) technique.The Rietveld refinements of the samples indicate that at higher concentrations of La3+,nanostructures with dual phase,i.e.cubic spinel and orthorhombic LaFeO_3 perovskite with space group(Pbnm) appear.Optical studies show that the energy band gap(E_g) of the bare LiCo_(0.25)Zn_(0.25)Fe_2 O_4 ferrite sample(2.18 eV) reaches up to 2.47 eV at x=0.06 and above this concentration,it drops sharply to 2.00 eV.Although the saturation magnetization and the coercivity of LiCo_(0.25)Zn_(0.25)La_xFe_(2-x)O_4 are lower than that of LiCo_(0.25)Zn_(0.25)Fe_2 O_4 NPs.Overall,the superparamagnetic nature and low values of saturation magnetization and coercivity of LiCo_(0.25)Zn_(0.25)La_xFe_(2-x)O_4 NPs are suitable to be applied in transformers core. |
| |
| Keywords: | Li-Co-Zn ferrite Superparamagnetic nature Optical properties Magnetic behavior Transformers core Rare earths |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
|
