首页|Enhanced saturation magnetization in La3+doped NiCo ferrites prepared by sol-gel auto-combustion method
Enhanced saturation magnetization in La3+doped NiCo ferrites prepared by sol-gel auto-combustion method
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
Lanthanum doped nickel-cobalt nano ferrites with chemical formula Ni0.5Co0.5LaxFe2-xO4(x=0.05,0.10,0.15 and 0.20)were prepared using a simple sol-gel auto combustion method.The basic structural properties were determined by X-ray diffraction method and the formation of single phased spinel ferrite was confirmed.The crystalline size decreased from 25 to 11 nm and lattice parameter a increases with increase of La doping.The surface morphology of these ferrites was observed by field-emission scanning electron microscopy(FESEM)and agglomerated irregular grains are observed with increase of the rare earth element La doping.Energy-dispersive X-ray spectroscopy(EDX)result confirms the presence of the required elements.The Fourier transform infrared spectroscopy(FTIR)spectrum in-dicates the formation of the spinel ferrite structure with M-O bonds.Optical direct band measurements from ultraviolet-visible spectroscopy(UV-Vis)spectroscopy indicate that the direct band gap decreases from 1.39 to 1.19 eV for x=0.05 to x=0.15,then increases to 1.28 eV for x=0.20.The room temperature magnetic properties of these ferrites were studied by a vibrating sample magnetometer(VSM).The enhanced saturation magnetization of 49.73 emu/g is observed for x=0.10 and then saturation mag-netizations are gradually decreased for x=0.15 and x=0.20.Interestingly the remanent magnetization and coercivity also follow the same trend.
FerritesSol-gel auto combustionLa dopingMagnetic propertiesRare earths
NETL
NSTL
万方数据
