Comparison of rare earths doping(neodymium and samarium) on structural and magnetic properties of Ni-Zn-Bi nanoferrites  

作　　者：Shilpa Taneja Preeti Thakur Dinesh Kumar Yassine Slimani Atul Thakur 

机构地区：[1]NanoLatticeX,Amity University Haryana,Gururam,122413,Haryana,India [2]Nanotechnology Wing,Innovative Science Research Society,Shimla,177002,India [3]Centre for Nanotechnology,Amity University Haryana,Gururam,122413,Haryana,India [4]Department of Biophysics,Institute for Research and Medical Consultations(IRMC),Imam Abdulrahman Bin Faisal University,P.O.Box 1982,Dammam,31441,Saudi Arabia [5]School of Electronics and Information Engineering,Nanjing University of Information Science&Technology,Nanjing,210044,China

出　　处：《Journal of Rare Earths》2024年第3期534-542,I0004,共10页稀土学报（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(2022YFE0122700);in part by National Natural Science Foundation of China(62371241,62350610268,61971230);in part by the Jiangsu Distinguished Professor Program(R2022T48)。

摘　　要：Excellent magnetic properties in ferrites are required for high-frequency applications and for wastewater treatment. Thus, the present study shows the comparison of magnetic and structural properties of Nd and Sm substituted Ni-Zn-Bi ferrites with the series Ni_(0.5)Zn_(0.5)Bi_(0.04)Nd_(x)Fe_(1.96-x)O_4(with step size 0.002)and Ni_(0.5)Zn_(0.5)Bi_(0.04)Sm_(x)Fe_(1.96-x)O_4(with step size 0.02) prepared using citrate precursor method. The impact of the substitution of rare earth ions(Nd and Sm) on magnetic properties of the synthesized samples is observed using a vibrating sample magnetometer(VSM). The saturation magnetization values enhance considerably from 52 to 58 emu/g for Nd^(3+)ions and 39 to 57 emu/g for Sm^(3+) ions, thus, making these materials magnetically hard. Further, the higher value of coercivity is also observed ranging from133 to 167 Oe for Nd^(3+)ions and 81 to 155 Oe for Sm^(3+) ions. The shape of hysteresis loops indicates a super paramagnetic and ferromagnetic behavior in the obtained samples. The squareness ratio value is<0.5, suggesting the uniaxial anisotropy of particles and hence, these ferrites are suitable for microwaveabsorbing and in permanent magnetic materials. The X-ray diffraction(XRD) pattern shows the formation of pure cubic crystallites, where, lattice parameters range from 0.840 to 0.839 nm and from 0.838to 0.839 nm for Nd^(3+)and Sm^(3+) ions substitution, respectively. The crystallite size ranges between 28.63to 29.89 nm and 18.33 to 26.23 nm, for substitution of Nd^(3+)and Sm^(3+) ions, respectively. Field emission scanning electron microscopy(FESEM) shows the formation of homogeneous grains, whereas, energy dispersive spectrometer(EDS) counts describe the purity of the samples. The Sm concentration x = 0.10has the maximum surface area with value of 42.6 m^(2)/g which proves to be having good data storage application due to high surface area. The zero-field cooled(ZFC) and field cooled(FC) data show that Nddoped Ni-Zn-Bi nanoferrites show superparamagnetic behaviour in the

关 键 词：Citrate precursor X-ray diffraction Vibrating sample magnetometer COERCIVITY Field emission scanning electron microscopy Rare earths 

分 类 号：TB383.1[一般工业技术—材料科学与工程]