Enhanced ferromagnetic transition and magnetoresistance in granular Ag-added La0.7Ca0.3MnO3

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	Enhanced ferromagnetic transition and magnetoresistance in granular Ag-added La0.7Ca0.3MnO3
	Y. H. Huang; K. F. Huang; F. Luo; L. L. He; Z. M. Wang; C. S. Liao; C. H. Yan
	2003
发表期刊	Journal of Solid State Chemistry
ISSN	0022-4596
卷号	174 期号:2 页码:257-263
摘要	Granular Ag-added La0.7Ca0.3MnO3 (LCMO) samples were prepared by a sol-gel chemical route. Significant enhancements in Curie temperature (T-C), metal-insulator transition (T-p) and magnetoresistance (MR) effects near room temperature arc observed in as-obtained samples. 10 wt% addition of Ag in LCMO causes T-C shift from 272 to 290 K T-p boost up for more than 100 K and resistivity decrease by more than 3 orders of magnitude. X-ray diffraction patterns, thermal analysis and energy dispersive analysis of X-rays evidently show the existence of metal silver in LCMO matrices. High-resolution electron microscopy illustrates a well crystallization for LCMO grains in existence of Ag. It is argued that improved grain boundary effect and better crystallization caused by Ag addition are responsible for the enhancements. (C) 2003 Elsevier Inc. All rights reserved.
部门归属	peking univ, coll chem & mol engn, pku hku joint lab rare earth mat & bioinorgan che, beijing 100871, peoples r china. chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china. peking univ, state key lab rare earth mat chem & applicat, coll chem & mol engn, beijing 100871, peoples r china.;yan, ch (reprint author), peking univ, state key lab rare earth mat chem & applicat, coll chem & mol engn, beijing 100871, peoples r china
关键词	Ag-added La0.7ca0.3mno3 Synthesis Magnetic Behavior Transport Room-temperature Magnetoresistance La0.8ca0.2mno3 Thin-films Giant Magnetoresistance Transport-properties Manganites La0.67ca0.33mno3 La1-xcaxmno3 Perovskites Deposition Silver
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WOS记录号	WOS:000185180500004
引用统计	被引频次：54[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/321006/35862
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. H. Huang,K. F. Huang,F. Luo,et al. Enhanced ferromagnetic transition and magnetoresistance in granular Ag-added La0.7Ca0.3MnO3[J]. Journal of Solid State Chemistry,2003,174(2):257-263.
APA	Y. H. Huang.,K. F. Huang.,F. Luo.,L. L. He.,Z. M. Wang.,...&C. H. Yan.(2003).Enhanced ferromagnetic transition and magnetoresistance in granular Ag-added La0.7Ca0.3MnO3.Journal of Solid State Chemistry,174(2),257-263.
MLA	Y. H. Huang,et al."Enhanced ferromagnetic transition and magnetoresistance in granular Ag-added La0.7Ca0.3MnO3".Journal of Solid State Chemistry 174.2(2003):257-263.