Structure and magnetic properties of FePt and FePt/Ag thin films deposited by magnetron sputtering

被引：40
作者：
Xu, XH [1 ]
Wu, HS [1 ]
Wang, F [1 ]
Li, XL [1 ]
机构：
[1] Shanxi Normal Univ, Sch Chem & Mat Sci, Linfen Shanxi 041004, Peoples R China
来源：
THIN SOLID FILMS | 2005年 / 472卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
superlattices; X-ray diffraction; annealing; magnetic properties and measurements;
D O I：
10.1016/j.tsf.2004.07.069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The magnetic properties and structures of FePt and FePt/Ag thin films deposited by DC and RF magnetron sputtering were studied. The results show that the coercivity of FePt thin films is significantly higher when the stoichiometry is near the equiatomic composition. After annealed at 550degreesC for 30 min, FePt and FePt/Ag thin films become magnetically hard with coercivities in the range of 9-10 kOe due to high anisotropy energy associated with the L1(0) ordered phase. After annealing at the lower temperature of 350degreesC for 1 h, FePt films without Ag underlayers were FCC disordered. When Ag underlayers were used, FePt/Ag thin films have a high in-plane coercivity of 6236 Oe. Results indicate that the Ag underlayers are able to reduce the ordering temperature of FePt films. Furthermore, it was found that coercivities of FePt/ Ag thin films strongly depend on the sputtering pressure of Ag underlayers. Ag underlayers can slightly reduce the intergranular exchange interactions of the FePt magnetic recording films. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：222 / 226
页数：5
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