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	Exchange bias and training effect in Ni/Ag-doped NiO bilayers
	Yang, P. Y. ; Zeng, F. ; Pan, F.
	2010-10-12 ; 2010-10-12
关键词	Exchange bias Training effect NiO thin films COOLING-FIELD ANISOTROPY FILMS Materials Science, Multidisciplinary Physics, Condensed Matter
中文摘要	A series of polycrystalline Ag-doped Ni1-xAgxO/Ni bilayers with x up to 0.2 were prepared by magnetron sputtering. X-ray diffraction, atomic force microscopy and transmission electron microscopy analyses reveal that Ag doping significantly reduces the mean NiO grain size and leads to the appearance of Ag nanoparticles on the surface of the Ag-doped NiO films. As x increases, the exchange bias field and coercivity at room temperature decrease as a consequence of the reduced thermal stability of smaller NiO grains and the screening effect resulting from the interfacial Ag nanoparticles. At lower temperatures, a slight enhancement of the exchange bias field is observed in the Ag-doped sample, indicating that the Ag doping increases the uncompensated NiO spin density. In addition, our studies find that the training effect of the Ag-doped sample can be well described by a spin configurational relaxation model, regardless of the presence of Ag nanopartiles at the interface. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78342]
专题	清华大学
推荐引用方式 GB/T 7714	Yang, P. Y.,Zeng, F.,Pan, F.. Exchange bias and training effect in Ni/Ag-doped NiO bilayers[J],2010, 2010.
APA	Yang, P. Y.,Zeng, F.,&Pan, F..(2010).Exchange bias and training effect in Ni/Ag-doped NiO bilayers..
MLA	Yang, P. Y.,et al."Exchange bias and training effect in Ni/Ag-doped NiO bilayers".(2010).

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