INFLUENCE OF THE NONMAGNETIC METAL SPACER ON THE MAGNETIC PROPERTIES AND MICROSTRUCTURE OF THE MULTILAYER FILMS

H.W. Jiang¹，F.W. Zhu²，W.Y. Lai³，G.H. Yu²，M.H. Li⁴

(1.Department of Physics, Capital Normal University, Beijing 100037, China;
2.Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083,China;
3.Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
4.College of Mechanical Engineering, South China University of Technology, Guangzhou 510640,China)

Abstract:Ta/NiFe/Bi (Ag,Cu)/FeMn/Ta and Ta/NiFeⅠ/FeMn/Bi (Ag, Cu)/NiFeⅡ/Ta films were prepared by magnetic sputtering. The texture and the dependences of the exchange-coupling field on the thickness of Bi, Ag, and Cu in Ta/NiFe/Bi(Ag, Cu) /FeMn/Ta and Ta/NiFeⅠ/FeMn/Bi(Ag, Cu)/NiFeⅡ/Ta films were studied. XPS results indicate that the Bi atoms migrated into the FeMn layer during the deposition process and a FeMnBi alloy was probably formed or the Bi atoms existed as an impurity in the FeMn layer in Ta/NiFe/Bi(Ag, Cu)/FeMn/Ta. Otherwise, in Ta/NiFeⅠ/FeMn/Bi (Ag, Cu ) /NiFeⅡ/Ta films, Bi, Ag, and Cu atoms do not remain entirely at the interface of the FeMn/NiFeⅡ film, but at least partly segregate to the surface of the NiFe film.

Key words:NiFe/FeMn; nonmagnetic spacer; exchange coupling; XPS (X-ray photo-electron spectroscopy);

【全文内容正在添加中】