Microstructure and inter-grain magnetoresistance in Ag-doped polycrystalline La0.67Sr0.33MnO3 thin films

IMR OpenIR

	Microstructure and inter-grain magnetoresistance in Ag-doped polycrystalline La0.67Sr0.33MnO3 thin films
	J. Li; C. K. Ong; Q. Zhan; D. X. Li
	2002
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	14 期号:25 页码:6341-6351
摘要	Ag-doped La0.67Sr0.33MnO3 thin films with various Ag concentrations were deposited on (001) LaAlO3 substrates at 400degreesC by using a dual-beam pulsed-laser deposition system. The Ag-doped films show polycrystalline structure with epitaxial c-axis columns. These columns were composed of closely arranged polyhedra of size 10-15 nm, resulting from the enhanced stress-induced grain boundary diffusion. In the case of heavy doping, tiny separated Ag crystals were observed at grain boundaries. Due to the interaction between the two laser-induced plumes, the Ag precipitation also helped to form anomalous clusters consisting of nano-sized grains and amorphous phase. By adjusting the deposition conditions carefully, we can tailor the microstructure of the film and correspondingly alter the resistivity and the inter-grain magnetoresistance of the Ag-doped films. Theoretical simulation led to results consistent with the microstructure observations and the magnetoresistance measurements.
部门归属	natl univ singapore, csmm, singapore 117542, singapore. natl univ singapore, dept phys, singapore 117542, singapore. chinese acad sci, shenyang natl lab mat sci, met res inst, shenyang 110016, peoples r china.;li, j (reprint author), natl univ singapore, csmm, 2 sci dr 3, singapore 117542, singapore
关键词	Low-field Magnetoresistance Pulsed-laser Deposition Manganites Ablation Growth
URL	查看原文
WOS记录号	WOS:000177025700011
引用统计	被引频次：10[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/321006/36311
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Li,C. K. Ong,Q. Zhan,et al. Microstructure and inter-grain magnetoresistance in Ag-doped polycrystalline La0.67Sr0.33MnO3 thin films[J]. Journal of Physics-Condensed Matter,2002,14(25):6341-6351.
APA	J. Li,C. K. Ong,Q. Zhan,&D. X. Li.(2002).Microstructure and inter-grain magnetoresistance in Ag-doped polycrystalline La0.67Sr0.33MnO3 thin films.Journal of Physics-Condensed Matter,14(25),6341-6351.
MLA	J. Li,et al."Microstructure and inter-grain magnetoresistance in Ag-doped polycrystalline La0.67Sr0.33MnO3 thin films".Journal of Physics-Condensed Matter 14.25(2002):6341-6351.