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STRUCTURAL AND MAGNETIC PROPERTIES OF Mg-Co FERRITENANOPARTICLES

机译:Mg-Co铁素体纳米微粒的结构和磁性

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A series of magnesium-substituted cobalt ferrite nanoparticles Co1-xMgxFe2O4 (0.0 ≤ x ≤1.0, step 0.2), have been synthesized using sol–gel auto-combustion method. The powderscalcined at 600, 700, and 800 ?C for 3h. Various characterization methods were used toinvestigate the prepared powders such as X-ray diffraction (XRD), field emission scanningelectron microscopy (FE-SEM), and vibrating sample magnetometer (VSM). The XRDpatterns of the synthesized samples confirm the formation of single phase spinal structurednanoparticles. FE-SEM image results show some agglomerated of spherical andpolyhedral shape morphology. Moreover, the average crystallite size was found to beranging from (55.146-68.434nm). Saturation magnetization (Ms), remanent magnetization(Mr), and coercivity (Hc) decreases with increase in Mg substitution as indicated by VSMat room temperature. Both the structural and magnetic properties of Mg-Co ferritenanoparticles depend upon Mg2+ ions substitution.
机译:使用溶胶-凝胶自动燃烧法合成了一系列镁取代的钴铁氧体纳米粒子Co1-xMgxFe2O4(0.0≤x≤1.0,步骤0.2)。粉末在600、700和800°C下煅烧3小时。各种表征方法用于研究制备的粉末,例如X射线衍射(XRD),场发射扫描电子显微镜(FE-SEM)和振动样品磁强计(VSM)。合成样品的XRD图谱证实了单相脊结构纳米颗粒的形成。 FE-SEM图像结果显示出一些球形和多面体形状的团聚体。此外,发现平均微晶尺寸为(55.146-68.434nm)。饱和磁化强度(Ms),剩余磁化强度(Mr)和矫顽力(Hc)随Mg替代量的增加而降低,如室温下VSM所示。 Mg-Co铁氧体纳米粒子的结构和磁性都取决于Mg2 +离子的取代。

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