INFLUENCE OF THE NONMAGNETIC METAL SPACER ON THE MAGNETIC PROPERTIES AND MICROSTRUCTURE OF THE MULTI

• 作 者: M.H. Li G.H. Yu F.W. Zhu H.W. Jiang W.Y. Lai
• 机 构: College of Mechanical Engineering, South China University of Technology, Guangzhou 510640,China;Depa
• 出 处: 金属学报（英文版）
• 发表日期: 2006年4期
• 关键词: NiFe/FeMn nonmagnetic spacer exchange coupling XPS (X-ray photo-electron spectro

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.