Abstract: BaFe12-xCuxO19(x =0,0.2,0.4,0.6,0.8) barium ferrite was prepared by hydrothermal method,and the effect of Cu2+ doping on microstructure and magnetic energy of BaFe12O19 was studied.Through the analysis of M(o)ssbauer spectrum,Cu2+ can quantitatively be controlled into the lattice of BaFe12O19.The samples with different doping amount were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM),and the results show that the heat treatment of 800 ℃ can significantly improve BaFe12O19 crystalline nanoparticles.And the grain size of BaFe12O19 increases with the increase of Cu2+.From the results of magnetic measurement analysis,it can be learned that the proper incorporation of Cu2+ can reduce the coercivity of BaFe12O19 and the intensity of saturation magnetization,so that BaFe12O19 nanoparticles start to change from hard magnetism to soft and magnetic properties.

Key words: BaFe12-xCuxO19(x =0,0.2,0.4,0.6,0.8) barium ferrite was prepared by hydrothermal method,and the effect of Cu2+ doping on microstructure and magnetic energy of BaFe12O19 was studied.Through the analysis of M(o)ssbauer spectrum,Cu2+ can quantitatively be controlled into the lattice of BaFe12O19.The samples with different doping amount were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM),and the results show that the heat treatment of 800 ℃ can significantly improve BaFe12O19 crystalline nanoparticles.And the grain size of BaFe12O19 increases with the increase of Cu2+.From the results of magnetic measurement analysis,it can be learned that the proper incorporation of Cu2+ can reduce the coercivity of BaFe12O19 and the intensity of saturation magnetization,so that BaFe12O19 nanoparticles start to change from hard magnetism to soft and magnetic properties.