典型文献
High-temperature synthesis and electronic bonding analysis of Ca-doped LaMnO3 rare-earth manganites
文献摘要：
Doped lanthanum manganites La1-xCaxMnO3 with five different concentrations of Ca(x=0.1,0.2,0.3,0.4 and 0.5)were synthesized by high-temperature solid-state reaction method and characterized.The prepared samples were experimentally analyzed by X-ray diffraction(XRD),ultraviolet-visible spectroscopy(UV-Vis),scan-ning electron microscopy/energy dispersive spectroscopy(SEM/EDS)and vibrating sample magnetometer(VSM)measurements.Orthorhombic structure is confirmed for this compound from powder X-ray diffraction data.The XRD data confirm the shrinkage in the unit cell of syn-thesized samples for increasing calcium concentration.The UV-Visible analysis for the estimation of optical band gap(Eg)reveals that the band gap decreases with the incor-poration of Ca.The synthesized samples were investigated for charge density distribution using maximum entropy method,utilizing the XRD data sets.From the charge density analysis,it is found that the bond lengths for La-O and Mn-O bonds decrease with the addition of Ca.The ionic nature between La and O atoms and covalent nature between Mn and O atoms are enhanced for 40％of cal-cium-doping.For 50％of Ca-doped sample,ionic nature between La and O atoms and covalent nature between Mn and O atoms decrease.All the prepared samples exhibit ferromagnetism at 20 K and paramagnetism at 300 K.
文献关键词：
中图分类号：
作者姓名：
Natarajan Thenmozhi;Ramachandran Saravanan
作者机构：
Post Graduate and Research Department of Physics,Nadar Mahajana Sangam S.Vellaichamy Nadar College,Nagamalai,Madurai,Tamil Nadu 625019,India;Research Centre and Post Graduate Department of Physics,The Madura College,Madurai,Tamil Nadu 625011,India
文献出处：
引用格式：
[1]Natarajan Thenmozhi;Ramachandran Saravanan-.High-temperature synthesis and electronic bonding analysis of Ca-doped LaMnO3 rare-earth manganites)[J].稀有金属（英文版）,2022(11):3932-3942
A类：
manganites,xCaxMnO3,poration
B类：
High,temperature,synthesis,electronic,bonding,analysis,doped,LaMnO3,rare,earth,Doped,lanthanum,La1,five,different,concentrations,were,synthesized,by,high,solid,state,reaction,method,characterized,prepared,samples,experimentally,analyzed,ray,diffraction,ultraviolet,visible,spectroscopy,UV,scan,ning,microscopy,energy,dispersive,EDS,vibrating,magnetometer,VSM,measurements,Orthorhombic,structure,confirmed,this,compound,from,powder,data,shrinkage,unit,cell,increasing,calcium,Visible,estimation,optical,band,gap,Eg,reveals,that,decreases,incor,investigated,charge,density,distribution,using,maximum,entropy,utilizing,sets,From,found,lengths,bonds,addition,ionic,nature,between,atoms,covalent,enhanced,doping,For,All,exhibit,ferromagnetism,paramagnetism
AB值：
0.523552
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