The A-site disorder effects and enhanced magnetoresistance in La0.55Sr0.45MnO3

doi:10.1016/j.tsf.2010.03.131

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	The A-site disorder effects and enhanced magnetoresistance in La0.55Sr0.45MnO3
	Wang, K. F.1; Luo, W. Z.1; Dong, S.1; Li, D.2,3; Zhang, Z. D.2,3; Ren, Z. F.1,4; Liu, J. -M.1,2
刊名	THIN SOLID FILMS
	2010-10-01
卷号	518 期号:24 页码:E38-E41
关键词	A-site disorder Manganites Colossal magnetoresistive effect Phase separation
ISSN号	0040-6090
DOI	10.1016/j.tsf.2010.03.131
通讯作者	Wang, K. F.(wangkf@nju.edu.cn)
英文摘要	By modulating the A-site cational size mismatch we introduce different A-site disorder strengths in large-bandwidth manganites such as La0.55Sr0.45MnO3, 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 La0.55Sr0.45MnO3). 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.
资助项目	National Natural Science Foundation of China[50832002] ; National Natural Science Foundation of China[50601013] ; National Key Programs for Basic Researches of China[2006CB921802]
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000295942000009
资助机构	National Natural Science Foundation of China ; National Key Programs for Basic Researches of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/100348]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, K. F.
作者单位	1.Nanjing Univ, Solid State Microstruct Lab, Nanjing 210093, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA
推荐引用方式 GB/T 7714	Wang, K. F.,Luo, W. Z.,Dong, S.,et al. The A-site disorder effects and enhanced magnetoresistance in La0.55Sr0.45MnO3[J]. THIN SOLID FILMS,2010,518(24):E38-E41.
APA	Wang, K. F..,Luo, W. Z..,Dong, S..,Li, D..,Zhang, Z. D..,...&Liu, J. -M..(2010).The A-site disorder effects and enhanced magnetoresistance in La0.55Sr0.45MnO3.THIN SOLID FILMS,518(24),E38-E41.
MLA	Wang, K. F.,et al."The A-site disorder effects and enhanced magnetoresistance in La0.55Sr0.45MnO3".THIN SOLID FILMS 518.24(2010):E38-E41.