Synthesis and characterization of Co1-2xNixMnxCeyFe2-yO4 nanoparticles
来源期刊：Journal of Rare Earths2020年第2期
论文作者：Munirah Abdullah Almessiere Yassine Slimani Abdulhadi Baykal
文章页码：188 - 194
摘 要：Spinel ferrite Co1-2 xNixMnxFe2-yCeyO4（0.0≤x=y≤0.3） nanoparticles（NPs） were prepared by sol-gel auto-combustion method.The synthesized NPs were examined using several techniques such as X-ray diffraction（XRD）,field emission scanning electron microscopy（FE-SEM） coupled with EDX and elemental mapping,transmission electron microscopy（TEM）,Fourier-transform infrared spectroscopy（FT-IR）,and a vibrating sample magnetometer（VSM）.The analysis of the crystal structure and the phase identification of samples indicates the formation of spinel cubic phase with the occurrence of CeO2 as secondary phase when the content of Ce substitution element increases.In addition,all produced samples exhibit cubic symmetry with space group Fd3m.TEM confirms the presence of two phases,i.e.,the cubic spinel ferrite and the cubic cerium oxide（CeO2）.The characteristics of hysteresis loops reveal the soft ferrimagnetic nature of the different synthesized samples.The saturation（Ms） and remanent（Mr） magnetizations fall on increasing the content of substituting elements.Compared with pure CoFe2O4 NPs,the value of coercive field（Hc） slightly increases for x=y=0.1 and x=y=0,2 NPs.Then,Hc reduces with further increasing the x and y contents.The squareness ratio is found to be in the 0.528-0.400 interval,indicating the single domain NPs with uniaxial anisotropy for the different produced NPs.The magneto crystalline anisotropy constant(Keff),anisotropy field（Ha）,magneton number（nB） and the demagnetizing field（N） were also determined and discussed.
Munirah Abdullah Almessiere1,2，Yassine Slimani2，Abdulhadi Baykal3
1. Department of Physics,College of Science,Imam Abduirahman Bin Faisal University2. Department of Biophysics,Institute for Research & Medical Consultations (IRMC),Imam Abdulrahman Bin Faisal University3. Department of Nano-Medicine Research,Institute for Research&Medical Consultations (IRMC),Imam Abdulrahman Bin Faisal University
摘 要：Spinel ferrite Co1-2 xNixMnxFe2-yCeyO4（0.0≤x=y≤0.3） nanoparticles（NPs） were prepared by sol-gel auto-combustion method.The synthesized NPs were examined using several techniques such as X-ray diffraction（XRD）,field emission scanning electron microscopy（FE-SEM） coupled with EDX and elemental mapping,transmission electron microscopy（TEM）,Fourier-transform infrared spectroscopy（FT-IR）,and a vibrating sample magnetometer（VSM）.The analysis of the crystal structure and the phase identification of samples indicates the formation of spinel cubic phase with the occurrence of CeO2 as secondary phase when the content of Ce substitution element increases.In addition,all produced samples exhibit cubic symmetry with space group Fd3m.TEM confirms the presence of two phases,i.e.,the cubic spinel ferrite and the cubic cerium oxide（CeO2）.The characteristics of hysteresis loops reveal the soft ferrimagnetic nature of the different synthesized samples.The saturation（Ms） and remanent（Mr） magnetizations fall on increasing the content of substituting elements.Compared with pure CoFe2O4 NPs,the value of coercive field（Hc） slightly increases for x=y=0.1 and x=y=0,2 NPs.Then,Hc reduces with further increasing the x and y contents.The squareness ratio is found to be in the 0.528-0.400 interval,indicating the single domain NPs with uniaxial anisotropy for the different produced NPs.The magneto crystalline anisotropy constant(Keff),anisotropy field（Ha）,magneton number（nB） and the demagnetizing field（N） were also determined and discussed.
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