Charge Ordering and Antiferromagnetic Transition in La0.67-xPrxCa0.33 MnO3 (x=0～0.67)Polycrystalline
Polycrystalline samples of La<,0.67-x>Pr<,x>Ca<,0.33> MnO<,3> (x=0～0.67) were synthesized by a conventional solid state reaction. X-ray diffraction revealed that the samples were all of single phase with an orthorhombic distorted perovskite structure. The magnetization depended on temperature measured in FC (field cooling) and ZFC (zero field cooling). It revealed that the compounds mainly underwent a ferromagnetic transition (T<,c>) when the less Pr doped (x<0.4). With increasing doping content (x> 0.5), the ferromagnetic transition disappeared and the antiferromagnetic transition (T<,N>) was dominant. Charge ordering (T<,CO>) also emerged when x>0.36. The transition temperatures T<,N> and T<,CO> would change with the Pr doping content. The phase separation could be used to explain these characters occurred in these polycrystalline samples.
charge ordering antiferromagnetic phase separation rare earths
Cao Xiaoming(曹晓明) Lu Zunming(卢遵铭) Wang Liheng(王立恒) Li Yangxian(李养贤)
School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China Hebei No. 1 Electric Power Construction Company, Shijiazhuang 050031, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
204-206
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）