The A-site disorder effects and enhanced magnetoresistance in La(0.55)Sr(0.45)MnO(3)

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	The A-site disorder effects and enhanced magnetoresistance in La(0.55)Sr(0.45)MnO(3)
	K. F. Wang ; W. Z. Luo ; S. Dong ; D. Li ; Z. D. Zhang ; Z. F. Ren ; J. M. Liu
刊名	Thin Solid Films
	2010
卷号	518 期号:24 页码:E38-E41
关键词	A-site disorder Manganites Colossal magnetoresistive effect Phase separation double-exchange la1-xsrxmno3 manganites physics oxides
ISSN号	0040-6090
中文摘要	By modulating the A-site cational size mismatch we introduce different A-site disorder strengths in large-bandwidth manganites such as La(0.55)Sr(0.45)MnO(3), which are regarded as the typical ferromagnetic double exchange (DE) systems due to the relative large A-site cational mean radius ( = 1.23 angstrom for La(0.55)Sr(0.45)MnO(3)). It is revealed that the increasing A-site disorder doesn't induce remarkable macroscopic change of the crystallographic structure and lattice constants, but causes notable change of the magnetotransport properties by suppressing the DE interaction and the ferromagnetism. For small A-site disorder, the long-range ferromagnetism is broken and replaced with the short-range antiferromagnetic regions embedded in the ferromagnetic matrix. The high A-site disorder will eventually lead to melting of the long-range ferromagnetic order into the short-range magnetically ordered clusters. And the enhanced magnetoresistant effects were found in the samples with intermediate disorder. (C) 2010 Elsevier B.V. All rights reserved.
原文出处	://WOS:000295942000009
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31502]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	K. F. Wang,W. Z. Luo,S. Dong,et al. The A-site disorder effects and enhanced magnetoresistance in La(0.55)Sr(0.45)MnO(3)[J]. Thin Solid Films,2010,518(24):E38-E41.
APA	K. F. Wang.,W. Z. Luo.,S. Dong.,D. Li.,Z. D. Zhang.,...&J. M. Liu.(2010).The A-site disorder effects and enhanced magnetoresistance in La(0.55)Sr(0.45)MnO(3).Thin Solid Films,518(24),E38-E41.
MLA	K. F. Wang,et al."The A-site disorder effects and enhanced magnetoresistance in La(0.55)Sr(0.45)MnO(3)".Thin Solid Films 518.24(2010):E38-E41.