Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles

doi:10.1103/PhysRevB.78.224408

IMR OpenIR

	Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles
	Huang, X. H.1; Ding, J. F.; Zhang, G. Q.; Hou, Y.; Yao, Y. P.; Li, X. G.
通讯作者	Huang, X. H.()
	2008-12-01
发表期刊	PHYSICAL REVIEW B
ISSN	1098-0121
卷号	78 期号:22 页码:5
摘要	Exchange bias phenomena are observed in La0.25Ca0.75MnO3 nanoparticles with average sizes ranging from 40 to 1000 nm. It is found that the magnetic hysteresis loops display horizontal and vertical shifts in field-cooled processes. The variations of the exchange bias field (H-EB) and the coercivity (H-c) with particle size follow nonmonotonic dependencies and show maxima for particles with diameter around 80 nm at T=5 K, which can be mainly ascribed to the changes in uncompensated surface spins with nanoparticle size. The peak position for H-c shifts to larger particle size at higher temperature while that for H-EB is unconspicuous. The linear relationship between H-EB and vertical magnetization shift (M-EB) further indicates that the characteristics of uncompensated spins play an important role in the variations of H-EB for the manganite.
关键词	calcium compounds coercive force exchange interactions (electron) lanthanum compounds magnetic cooling magnetic hysteresis magnetic particles nanoparticles particle size
资助者	National Natural Science Foundation of China ; National Basic Research Program of China
DOI	10.1103/PhysRevB.78.224408
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50721061] ; National Natural Science Foundation of China[50832007] ; National Basic Research Program of China[2006CB922005] ; National Basic Research Program of China[2009CB929502]
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:000262245200055
出版者	AMER PHYSICAL SOC
引用统计	被引频次：144[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/321006/94472
专题	中国科学院金属研究所
通讯作者	Huang, X. H.
作者单位	1.Univ Sci & Technol China, Dept Phys, Hefei Natl Lab Phys Sci Microscale, 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	Huang, X. H.,Ding, J. F.,Zhang, G. Q.,et al. Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles[J]. PHYSICAL REVIEW B,2008,78(22):5.
APA	Huang, X. H.,Ding, J. F.,Zhang, G. Q.,Hou, Y.,Yao, Y. P.,&Li, X. G..(2008).Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles.PHYSICAL REVIEW B,78(22),5.
MLA	Huang, X. H.,et al."Size-dependent exchange bias in La0.25Ca0.75MnO3 nanoparticles".PHYSICAL REVIEW B 78.22(2008):5.