Doping effects from Fe and Ge for Mn in La1-xCaxMnO3 (x=0.15-0.6)

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	Doping effects from Fe and Ge for Mn in La1-xCaxMnO3 (x=0.15-0.6)
	Sun, JR ; Li, RW ; Zhang, YZ ; Shen, BG
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2001
卷号	34 期号:9 页码:1333
关键词	MAGNETIC PHASE-DIAGRAM COLOSSAL MAGNETORESISTANCE MANGANESE PEROVSKITES MOSSBAUER LA0.67CA0.33MN0.9FE0.1O3 TRANSPORT CO
ISSN号	0022-3727
通讯作者	Sun, JR: Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China.
中文摘要	Effects from 4% Fe or Ge for Mn in La1-xCaxMnO3 (x = 0.15-0.6) are studied experimentally. All the compounds exhibit orthorhombic structure, unaffected by the introduction of Fe and Ge. The magnetic ordering temperature (T-c) and, accordingly, the metal-insulator transition decrease systematically due to the presence of secondary ions at the Mn lattice. The doping effects depend on dopant and Ca content, and the typical reduction in T-c, compared to the undoped counterparts, is similar to 60 K. Ge is more effective in suppressing the magnetic coupling for x less than or equal to 0.35, as indicated by the similar to 25 K lower Curie temperature in the Ge-doped compounds. When x exceeds 0.35, the Fe- and Ge-doping effects reverse. The other striking observation of the present study is the significant ferromagnetic enhancement below similar to 130 K, characterized by a sharp jump of the magnetization under a field of 5 T, and the re-entrance of the charge ordering state below similar to 50 K in the Ce-doped La0.5Ca0.5MnO3. The different doping effects of Fe and Ge presumably originate from their different roles of charge carrier mobility. The magnetic coupling between Fe and host Mn seems unimportant.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/36193]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Sun, JR,Li, RW,Zhang, YZ,et al. Doping effects from Fe and Ge for Mn in La1-xCaxMnO3 (x=0.15-0.6)[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2001,34(9):1333.
APA	Sun, JR,Li, RW,Zhang, YZ,&Shen, BG.(2001).Doping effects from Fe and Ge for Mn in La1-xCaxMnO3 (x=0.15-0.6).JOURNAL OF PHYSICS D-APPLIED PHYSICS,34(9),1333.
MLA	Sun, JR,et al."Doping effects from Fe and Ge for Mn in La1-xCaxMnO3 (x=0.15-0.6)".JOURNAL OF PHYSICS D-APPLIED PHYSICS 34.9(2001):1333.