Size effects on charge ordering and magnetic properties in La0.25Ca0.75MnO3

doi:10.1016/j.ceramint.2007.10.026

IMR OpenIR

	Size effects on charge ordering and magnetic properties in La0.25Ca0.75MnO3
	Li, X. G.1,2; Zhang, T.1,2
通讯作者	Li, X. G.(lixg@ustc.edu.cn)
	2009
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	35 期号:1 页码:151-155
摘要	The size effects on the charge ordering (CO) and magnetic properties in La0.25Ca0.75MnO3 with mean particle size ranging from 40 to 2000 nm were studied. With decreasing particle size the CO transition temperature shifts to lower temperature and the transition width becomes increasingly wide, indicating the weakening of the CO state. Meanwhile the ferromagnetic (FM) cluster glass state appears and the magnetization at low temperature increases significantly. The behaviour is due to the increasing uncompensated surface spins which weaken the antiferromagnetic interaction and disfavour the formation of the CO state. The suppression of the CO state and appearance of the FM cluster glass state are also found in La0.25Ca0.75MnO3 nanowires fabricated by a sol-gel template method. These results indicate that the CO state can be modulated effectively by varying particle size, which has an important implication for nano-device applications of manganites. (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
关键词	C. Magnetic properties Charge ordering Manganites
资助者	National Natural Science Foundation of China ; National Basic Research Program of China
DOI	10.1016/j.ceramint.2007.10.026
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50421201] ; National Natural Science Foundation of China[10334090] ; National Basic Research Program of China[2006CB922005]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000261818300028
出版者	ELSEVIER SCI LTD
引用统计	被引频次：2[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/321006/99595
专题	中国科学院金属研究所
通讯作者	Li, X. G.
作者单位	1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Phys, Hefei 230026, Peoples R China 2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Li, X. G.,Zhang, T.. Size effects on charge ordering and magnetic properties in La0.25Ca0.75MnO3[J]. CERAMICS INTERNATIONAL,2009,35(1):151-155.
APA	Li, X. G.,&Zhang, T..(2009).Size effects on charge ordering and magnetic properties in La0.25Ca0.75MnO3.CERAMICS INTERNATIONAL,35(1),151-155.
MLA	Li, X. G.,et al."Size effects on charge ordering and magnetic properties in La0.25Ca0.75MnO3".CERAMICS INTERNATIONAL 35.1(2009):151-155.