QQ客服 官方微博 反馈留言

	Magnetic properties and magnetoresistance in small iron oxide cluster assemblies
	Peng, D. L. ; Asai, T. ; Nozawa, N. ; Hihara, T. ; Sumiyama, K. ; Peng DL(彭栋梁)
	2002
关键词	TUNNEL-JUNCTIONS GIANT MAGNETORESISTANCE GRANULAR METALS SPIN DISORDER FILMS NANOPARTICLES CONDUCTION CRO2
英文摘要	We report the magnetic properties and magnetoresistance (MR) in small iron oxide (Fe3-xO4 and Fe3O4) cluster assemblies. Half-metallic Fe3O4 cluster assembly with grain size of 10-15 nm is shown to exhibit a MR value of about 8% at T=30 K and a peak around the Verwey transition temperature T-v=115 K which is a little lower than the T-v value (similar to120 K) of single crystal specimens. Even at T=5 K, the magnetization is not saturated in fields up to 50 kOe. The MR behaviors of a Fe3-xO4-coated iron cluster assembly and a sample which was prepared by embedding the Fe3-xO4-coated iron clusters into a MgO matrix are also studied for comparison. The MR value of the latter is over one time larger than that of the former and is also larger than those of the Fe3O4 cluster assembly at various temperatures. It suggests that the barrier layer is important for enhancing the MR effect at high temperatures. (C) 2002 American Institute of Physics.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59467]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Peng, D. L.,Asai, T.,Nozawa, N.,et al. Magnetic properties and magnetoresistance in small iron oxide cluster assemblies[J],2002.
APA	Peng, D. L.,Asai, T.,Nozawa, N.,Hihara, T.,Sumiyama, K.,&彭栋梁.(2002).Magnetic properties and magnetoresistance in small iron oxide cluster assemblies..
MLA	Peng, D. L.,et al."Magnetic properties and magnetoresistance in small iron oxide cluster assemblies".(2002).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。