中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2565-2570.doi: 10.1088/1674-1056/18/6/074

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Influence of Fe cap layer on the structural and magnetic properties of Fe49Pt51/Fe bi-layers

魏福林1, 段朝阳2, 马斌2, 张宗芝2, 金庆原2   

  1. (1)Research Institute of Magnetic Materials, Lanzhou University, Lanzhou 730000, China; (2)State Key Laboratory for Advanced Photonic Materials and Devices, and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
  • 收稿日期:2008-12-12 修回日期:2009-03-04 出版日期:2009-06-20 发布日期:2009-06-20
  • 基金资助:
    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).

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)   

  1. a State Key Laboratory for Advanced Photonic Materials and Devices, and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; b Research Institute of Magnetic Materials, Lanzhou University, Lanzhou 730000, China
  • Received:2008-12-12 Revised:2009-03-04 Online:2009-06-20 Published:2009-06-20
  • Supported by:
    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).

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摘要： 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.

关键词: Fe cap layer, L10 FePt, magnetism

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.

Key words: Fe cap layer, L10 FePt, magnetism

中图分类号:  (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

  • 75.70.Cn
68.35.Ct (Interface structure and roughness) 68.55.-a (Thin film structure and morphology) 75.30.Et (Exchange and superexchange interactions) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.60.Jk (Magnetization reversal mechanisms)