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
	2010
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 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.
部门归属	[wang, k. f.; luo, w. z.; dong, s.; ren, z. f.; liu, j. -m.] nanjing univ, solid state microstruct lab, nanjing 210093, peoples r china. [li, d.; zhang, z. d.; liu, j. -m.] chinese acad sci, int ctr mat phys, shenyang, peoples r china. [li, d.; zhang, z. d.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [ren, z. f.] boston coll, dept phys, chestnut hill, ma 02467 usa.;wang, kf (reprint author), nanjing univ, solid state microstruct lab, nanjing 210093, peoples r china;wangkf@nju.edu.cn
关键词	A-site Disorder Manganites Colossal Magnetoresistive Effect Phase Separation Double-exchange La1-xsrxmno3 Manganites Physics Oxides
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31502
专题	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.