Influence of magnetic layer thickness on [Fe80Ni20–O/SiO2]n multilayer thin films

doi:10.1088/1674-1056/23/8/087504

Abstract In the present work, a series of [Fe₈₀Ni₂₀-O/SiO₂]_n multilayer thin films is fabricated using a reactive magnetron sputtering equipment. The thickness of SiO₂ interlayer is fixed at 3 nm, while the thickness values of Fe₈₀Ni₂₀-O magnetic films range from 10 nm to 30 nm. All films present obvious in-plane uniaxial magnetic anisotropy. With increasing the Fe₈₀Ni₂₀-O layer thickness, the saturation magnetization increases slightly and the coercivity becomes larger due to the enlarged grain size, which could weaken the soft magnetic property. The results of high frequency magnetic permeability characterization show that films with thin magnetic layer are more suitable for practical applications. When the thickness of Fe₈₀Ni₂₀-O layer is 10 nm, the multilayer film exhibits the most comprehensive high-frequency magnetic property with a real permeability of 300 in gigahertz range.

Keywords: magnetron sputtering multilayer films soft magnetic property high frequency permeability

Received: 04 September 2013
Revised: 26 March 2014
Accepted manuscript online:

PACS:	75.75.-c	(Magnetic properties of nanostructures)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
	75.30.Gw	(Magnetic anisotropy)
	75.50.Gg	(Ferrimagnetics)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB933103), the National Natural Science Foundation of China (Grant Nos. 51371154, 51301145, 51171158, and 50825101), and the Fundamental Research Funds for the Central Universities of China (Grant No. 201212G001).

Corresponding Authors: Wang Lai-Sen, Peng Dong-Liang
E-mail: wangls@xmu.edu.cn;dlpeng@xmu.edu.cn

Cite this article:

Wei Jian-Qing (魏建清), Geng Hao (耿昊), Xu Lei (徐磊), Wang Lai-Sen (王来森), Chen Yuan-Zhi (陈远志), Yue Guang-Hui (岳光辉), Peng Dong-Liang (彭栋梁) Influence of magnetic layer thickness on [Fe₈₀Ni₂₀–O/SiO₂]_n multilayer thin films 2014 Chin. Phys. B 23 087504

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Influence of magnetic layer thickness on [Fe80Ni20–O/SiO2]n multilayer thin films

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Influence of magnetic layer thickness on [Fe₈₀Ni₂₀–O/SiO₂]_n multilayer thin films