The interfacial structure and degradation mechanism of the GMR effect in Co90Fe10/Cu and Ni70Co30/Cu magnetic multilayers

	The interfacial structure and degradation mechanism of the GMR effect in Co90Fe10/Cu and Ni70Co30/Cu magnetic multilayers
	An, YK; Dai, B; Zhang, HD; Mai, ZH; Cai, JW; Wu, ZH; Wu ZH(吴忠华)
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2006
卷号	39 期号:9 页码:1711-1717
通讯作者	Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China ; Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China
英文摘要	We investigated the microstructures of Co90Fe10/Cu and Ni70Co30/CU multilayers before and after annealing at 285 degrees C for 2 h, as well as the influence of microstructures on the thermal degradation of the GMR (giant magnetoresistance) effect, using innovative x-ray anomalous scattering techniques. It is found that there exists a significant asymmetry between the interfaces on both sides of the Cu layers during the deposition. The diffusion only occurs at the Cu/Ni70Co30 and Cu/Co90Fe10 interfaces while the Ni70CO30/Cu and Co90Fe10/Cu interfaces are sharp. After annealing at 285 degrees C, the Co90Fe10/Cu interface is still sharp, but the Ni70Co30/CU interface forms a CuNi2Co intermixing region. X-ray diffuse scattering profiles performed with x-ray energy close to the Fe, Co, Ni and Cu K edges show that the local lateral environments of Fe, Co, Ni and Cu at the interfaces are different for both the as-deposited multilayers. After annealing, the interfacial lateral correlation lengths and the fractal exponent of the Ni70Co30/Cu multilayer decrease significantly and the difference of the interfacial lateral correlation lengths of Co, Ni and Cu becomes smaller. However, those of the Co90Fe10/Cu multilayer do not change. This indicates that the main cause of thermal degradation of the GMR effect is the compositional intermixing at the multilayer interface, which has more influence on the GMR effect than the atom diffusion along the grain boundary.
学科主题	Physics
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000238233900002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/239492]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	An, YK,Dai, B,Zhang, HD,et al. The interfacial structure and degradation mechanism of the GMR effect in Co90Fe10/Cu and Ni70Co30/Cu magnetic multilayers[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2006,39(9):1711-1717.
APA	An, YK.,Dai, B.,Zhang, HD.,Mai, ZH.,Cai, JW.,...&吴忠华.(2006).The interfacial structure and degradation mechanism of the GMR effect in Co90Fe10/Cu and Ni70Co30/Cu magnetic multilayers.JOURNAL OF PHYSICS D-APPLIED PHYSICS,39(9),1711-1717.
MLA	An, YK,et al."The interfacial structure and degradation mechanism of the GMR effect in Co90Fe10/Cu and Ni70Co30/Cu magnetic multilayers".JOURNAL OF PHYSICS D-APPLIED PHYSICS 39.9(2006):1711-1717.