Tuning structural,electrical,dielectric and magnetic properties of Mg-Cu-Co ferrites via dysprosium(Dy^(3+))doping  

作　　者：Maria Akhtar M.S.Hasan Nasir Amin N.A.Morley Muhammad Imran Arshad 

机构地区：[1]Department of Physics,Government College University,Faisalabad,38000,Pakistan [2]Department of Physics,The University of Lahore,53700,Pakistan [3]Department of Materials Science and Engineering,The University of Sheffield,S13JD,UK [4]Department of Physics&Astronomy,University College London,UK

出　　处：《Journal of Rare Earths》2024年第1期137-146,I0005,共11页稀土学报（英文版）

摘　　要：In current research work,Dy3+substituted Mg0.5Cu0.25Co0.25Fe2-xDyxO4(0.0≤x≤0.04 with the step interval of 0.01)soft ferrites were synthesized by the sol-gel auto combustion method.The prepared samples were characterized by the techniques using X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),Fourier transform infrared(FTIR)spectroscopy,curre nt-voltage(Ⅰ-Ⅴ)measurement,LCR meter,vibrating sample magnetometer(VSM)and Raman.XRD data reveal that the average crystallite size is 49.71 nm and the lattice constant is 0.83703 nm for sample x=0.03.The non-uniform grain growth was demonstrated by micrographs and impurity-free elemental composition was observed from EDX analysis.The DC resistivity has an increasing and decreasing trend in ferromagnetic and paramagnetic regions with an increase in temperature.Moreover,the high resistivity is observed with the order of 1010Ω·cm,and the activation energy is 0.944 eV for samples x=0.03.The dielectric parameters including dielectric constant,dielectric losses,and impedance gradually decrease with the increase in frequency from 8 Hz to 8 MHz.The minimum dielectric loss at high frequency is found for sample x=0.03.The coercivity(Hc)and saturation magnetization(Ms)are found in the ranges of 520.82-544.02 Oe and 20.5841-21.1473 emu/g,respectively.These observations confirm that dysprosium(x=0.03)doped MCC-soft ferrites may be applicable in transformer cores,microwave absorbance,and telecommunication devices.

关 键 词：Soft ferrites DC resistivity Dielectric loss IMPEDANCE COERCIVITY Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]