摘要
MgxNi1-xFe_(2)O_(4)(x=0,0.25,0.5,0.75,1)spinel ferrite material was analyzed to determine its magnetic properties and structure.X-ray diffraction(XRD),Mössbauer spectroscopy,and vibrating sample magnetometer(VSM)characterization were performed on the samples prepared using the sol-gel method.The results from XRD confirmed the existence of the single-phase cubic spinel structures Fd3m,as well as the evolution of the crystalline size(D),the lattice parameter(a)and cell volume in compounds.The Mössbauer spectra showed the distribution of cations and changes in the magnetic properties of the sample.VSM measurement revealed that the samples were room-temperature ferromagnetic.Moreover,the saturation magnetization(Ms)of the samples changed with the Mg^(2+)ion content x,and a maximum occured at x=0.5.Doping with Mg^(2+)ions increased the transfer of Ni^(2+)ions to tetrahedral sites,thus increasing the magnetic moment difference between tetrahedral(A)and octahedral(B)sites.Specifically,doping NiFe_(2)O_(4) with Mg^(2+)ions can enhance its magnetic properties and enhance its saturation magnetization.
作者
徐诗语
莫家俊
刘乐彬
刘敏
Shiyu Xu;Jiajun Mo;Lebin Liu;Min Liu(College of Nuclear Science and Technology,University of South China,Hengyang 430074,China;School of Physics,Huazhong University of Science and Technology,Wuhan 421001,China;Zhuhai Tsinghua University Research Institute Innovation Center,Zhuhai 519000,China)
基金
Project supported by the National Natural Science Foundation of China (Grant No.11447231)
the National Undergraduate Innovation and Entrepreneurship Training Program Support Projects of China
the Natural Science Foundation of Hunan Province,China (Grant No.2020JJ4517)
the Research Foundation of the Education Bureau of Hunan Province,China (Grant Nos.19A434,19A433,and 19C1621)
the Opening Project of the Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment,University of South China (Grant Nos.2019KFY10 and 2019KFY09)。
