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

doi:10.1016/j.tsf.2010.03.131

IMR OpenIR

	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
通讯作者	Wang, K. F.(wangkf@nju.edu.cn)
	2010-10-01
发表期刊	THIN SOLID FILMS
ISSN	0040-6090
卷号	518 期号:24 页码:E38-E41
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.
关键词	A-site disorder Manganites Colossal magnetoresistive effect Phase separation
资助者	National Natural Science Foundation of China ; National Key Programs for Basic Researches of China
DOI	10.1016/j.tsf.2010.03.131
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000295942000009
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/100350
专题	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.