Magnetic and structural properties of single-phase Gd3+-substituted Co-Mg ferrite nanoparticles

被引:84
作者
Abouzir, El [1 ]
Elansary, M. [1 ]
Belaiche, M. [1 ]
Jaziri, H. [2 ]
机构
[1] Mohammed V Univ, Fac Sci, Energy Res Ctr, Nanomat & Nanotechnol Unit,ENS, BP 5118, Rabat, Morocco
[2] Mohammed V Univ, ENS, Genet & Mol Biol, BP 5118, Rabat, Morocco
关键词
CATION DISTRIBUTION; DIELECTRIC-PROPERTIES; COFE2O4; GD; TEMPERATURE; MAGNESIUM; BEHAVIOR; SIZE;
D O I
10.1039/d0ra01841d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nanocrystalline Gd3+-doped Co-Mg ferrite nanoparticles with the chemical formula Co0.7Mg0.3Fe(2-x)GdxO4 (x = 0.02) were prepared by coprecipitation for the first time. The properties of the nanoparticles were investigated by X-ray diffraction, confirming a single-phase, highly crystalline cubic spinel structure in the space group Fd (3) over barm and an average crystallite size of 54 nm. The Fourier-transform infrared spectrum showed two fundamental absorption bands in the wavenumber range of 437-748 cm(-1) attributed to the stretching vibration of tetrahedral and octahedral sites in the spinel structure. Scanning electron microscopy analysis showed that the nanoparticles are different in shape and slightly agglomerated. Energy-dispersive X-ray spectroscopy demonstrated the purity of the nano-ferrite powder. Magnetic measurements revealed ferrimagnetic behavior at room and low temperatures with high coercivity and a high saturation magnetization of 95.68 emu g(-1), larger than that of pure bulk cobalt ferrite (80.8 emu g(-1)). Only ferrite cobalt synthesized sonochemically has been reported to have a higher saturation magnetization (92.5 emu g(-1)).
引用
收藏
页码:11244 / 11256
页数:13
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