Complex magnetic and electronic transport properties of (La,Gd)(1-x)SrxMnO3+delta perovskites

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	Complex magnetic and electronic transport properties of (La,Gd)(1-x)SrxMnO3+delta perovskites
	Sun, JR ; Rao, GH ; Liang, JK ; Shen, BG ; Wong, HK
刊名	APPLIED PHYSICS LETTERS
	1997
卷号	71 期号:25 页码:3718
关键词	CA-MN-O GIANT MAGNETORESISTANCE RESISTIVITY DEPENDENCE FILMS
ISSN号	0003-6951
通讯作者	Sun, JR: Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China.
中文摘要	The magnetic and transport properties of (La,Gd)(1-x)SrxMnO3-delta (x = 0.15, 0.2, 0.25, and 0.3) with a fixed tolerance factor t = 0.913 are studied. Special attention is paid to the postannealing effects of the compounds. Two magnetic transitions are observed in samples x = 0.2 and 0.25 which are single phase in structure according to powder x-ray diffraction. Different effects on the two resulting states are produced by the postannealing. Accompanying the weakening of the state at lower temperature, the magnetic ordering of high-temperature state is enhanced substantially by the introduction of excess oxygen due to annealing the samples in O-2. One typical paramagnetic-ferromagnetic transition occurs in samples x = 0.15 and 0.3. There is a strong indication that the magnetic states in x = 0.15 and 0.3 are, respectively, the developments of the high- and low-temperature states in x = 0.2 (or x = 0.25). The occurrence of two metal-semiconductor transitions in x = 0.15-0.25 and their responses to postannealing suggest magnetic heterogeneity in the compound. By assuming the coexistence of vacancy-rich and vacancy-deficient domains in the compounds, these observations can be understood qualitatively. (C) 1997 American Institute of Physics. [S0003-6951(97)02651-X].
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/311004/34987]
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,Rao, GH,Liang, JK,et al. Complex magnetic and electronic transport properties of (La,Gd)(1-x)SrxMnO3+delta perovskites[J]. APPLIED PHYSICS LETTERS,1997,71(25):3718.
APA	Sun, JR,Rao, GH,Liang, JK,Shen, BG,&Wong, HK.(1997).Complex magnetic and electronic transport properties of (La,Gd)(1-x)SrxMnO3+delta perovskites.APPLIED PHYSICS LETTERS,71(25),3718.
MLA	Sun, JR,et al."Complex magnetic and electronic transport properties of (La,Gd)(1-x)SrxMnO3+delta perovskites".APPLIED PHYSICS LETTERS 71.25(1997):3718.