Influence of an Fe cap layer on the structural and magnetic properties of Fe49Pt51/Fe bi-layers
Duan Chao-Yang(段朝阳)a), Ma Bin(马斌)a)†, Wei Fu-Lin(魏福林)b), Zhang Zong-Zhi(张宗芝)a), and Jin Qing-Yuan(金庆原)a)
aState Key Laboratory for Advanced Photonic Materials and Devices, and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; bResearch Institute of Magnetic Materials, Lanzhou University, Lanzhou 730000, China
Abstract The influences of an Fe cap layer on the structural and magnetic properties of FePt/Fe bi-layers are investigated. Compared with single FePt alloy films, a thin Fe layer can affect the crystalline orientation and improve the chemical ordering of L10 FePt films. Moreover, the coercivity increases when a thin Fe layer covers the FePt layer. Beyond a critical thickness, however, the Fe cover layer quickens the magnetization reversal of Fe49Pt51/Fe bi-layers by their exchange coupling.
Received: 12 December 2008
Revised: 04 March 2009
Accepted manuscript online:
PACS:
75.70.Cn
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Fund: Project supported
by the National Natural Science Foundation of China (Grant Nos
60490290, 60678008 and 50771032), the National Basic Research
Program of China (Grant No 2009CB929201) and the Science Foundation
of the Science and Technology
Committee of Shanghai (Grant No 06DJ14007).
Cite this article:
Duan Chao-Yang(段朝阳), Ma Bin(马斌), Wei Fu-Lin(魏福林), Zhang Zong-Zhi(张宗芝), and Jin Qing-Yuan(金庆原) Influence of an Fe cap layer on the structural and magnetic properties of Fe49Pt51/Fe bi-layers 2009 Chin. Phys. B 18 2565
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