论文摘要
This work investigated the effect of dysprosium（Dy）ions on the structural,microstructural and magnetic properties of nickel nanospinelferrite,NiFe2O4.The nanoparticles（NPs）of NiDyxFe2-xO4（0.0≤x≤0.1）were prepared via the hydrothermal method.The formation of cubic phase of Ni nanoferrite was confirmed through X-ray diffraction,field emission scanning and transmission electron microscopy.Moreover,the magnetic properties of NiDyxFe2-xP4（0.01≤x≤0.10）NPs were discussed.The magnetization versus field,M（H）curves exhibit super paramagnetic nature at room temperature and ferrimagnetic nature at low temperature（10 K）.A noticeable improvement in the different deduced magnetic parameters is obtained especially for the NiDy0.07Fe1.93O4（x = 0.07）product.The obtained result is mostly derived from the substitution of Fe3+ions of smaller ionic radii with Dy3+ions of larger ionic radii that will strengthen the super exchange interactions among nanoparticles.The calculated squareness ratios are found to be much less than 0.5,due to the effect of spin disorder in the surface regions of NiDyxFe2-xO4（0.01≤x≤0.10）NPs.The Dy3+ ions substitution increases the magnetic hardness（higher values of remanence Mr,coercivity Hc,and magnetic moment nB）of nickel nanoferrite samples.
论文目录
文章来源
类型: 期刊论文
作者: M.A.Almessiere,Y.Slimani,S.Güner,A.Baykal,I.Ercan
来源: Journal of Rare Earths 2019年08期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 无机化工,材料科学
单位: Department of Physics,College of Science,Imam Abdulrahman Bin Faisal University,Department of Nano-Medicine Research,Institute for Research & Medical Consultations(IRMC),Imam Abdulrahman Bin Faisal University,Department of Biophysics,Institute for Research & Medical Consultations(IRMC),Imam Abdulrahman Bin Faisal University,Institute of Inorganic Chemistry,RWTH Aachen University
分类号: TB383.1;TQ138.13
页码: 871-878
总页数: 8
文件大小: 1732K
下载量: 9