Enhancement of exchange bias in Ir-Mn/Co0.9Fe0.1 bilayers by inserting an ultra-thin Co0.6Fe0.4 layer

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	Enhancement of exchange bias in Ir-Mn/Co0.9Fe0.1 bilayers by inserting an ultra-thin Co0.6Fe0.4 layer
	Ni, J ; Cai, JW ; Lai, WY ; An, YK ; Mai, ZH
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2006
卷号	39 期号:4 页码:730
关键词	SPACER LAYER NONMAGNETIC SPACER ANISOTROPY FILMS FE CR
ISSN号	0022-3727
通讯作者	Ni, J: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China.
中文摘要	The exchange biasing of Co0.9Fe0.1 film by the antiferromagnet Ir-Mn via a thin intermediate Co0.6Fe0.4 layer was investigated. It has been found that the exchange bias is drastically enhanced with the insertion of an ultra-thin Co0-6Fe0.4 layer at the interface between Co0.9Fe0.1 and Ir-Mn layers. For the Ir0.25Mn0.75(100 angstrom)/Co0.9Fe0.1 (150 angstrom) bilayer, the pinning field at room temperature is raised from 92 to 206 Oe when a 4 angstrom Co0.6Fe0.4 layer is introduced at the interface, and further enhanced to 262 Oe with a 10 A Co0.6Fe0.4 insertion layer. The corresponding unidirectional anisotropy increases from 0.18 to 0.4 erg cm(-2) and reaches a value of 0.54 erg cm(-2). The extra large unidirectional anisotropy is maintained as the Co0.6Fe0.4 thickness exceeds 10 angstrom. The high blocking temperature of the Ir-Mn/Co0.9Fe0.1 bilayer is unaffected by the insertion of the Co0.6Fe0.4 layer. The present results indicate that exchange bias is essentially determined by interfacial spins and, most importantly, the performance of the exchange bias system Ir-Mn/Co0.9Fe0.1, which is commonly used in spin valve giant magnetoresistance devices, can be greatly promoted by the insertion of an ultra-thin interfacial Co0.6Fe0.4 layer.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37413]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Ni, J,Cai, JW,Lai, WY,et al. Enhancement of exchange bias in Ir-Mn/Co0.9Fe0.1 bilayers by inserting an ultra-thin Co0.6Fe0.4 layer[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2006,39(4):730.
APA	Ni, J,Cai, JW,Lai, WY,An, YK,&Mai, ZH.(2006).Enhancement of exchange bias in Ir-Mn/Co0.9Fe0.1 bilayers by inserting an ultra-thin Co0.6Fe0.4 layer.JOURNAL OF PHYSICS D-APPLIED PHYSICS,39(4),730.
MLA	Ni, J,et al."Enhancement of exchange bias in Ir-Mn/Co0.9Fe0.1 bilayers by inserting an ultra-thin Co0.6Fe0.4 layer".JOURNAL OF PHYSICS D-APPLIED PHYSICS 39.4(2006):730.