Effect of Au cap layer on the magnetic properties and the microstructure for FePt thin films

被引：34

作者：

Yuan, FT

Chen, SK ^{[1
]}

Chang, WC

Horng, L

机构：

[1] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 407, Taiwan

[2] Natl Chung Cheng Univ, Dept Phys, Chiayi 621, Taiwan

[3] Natl Changhua Univ Educ, Dept Phys, Changhua 500, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 15期

关键词：

D O I：

10.1063/1.1800285

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated, the effect of interfacial diffusion on the magnetic properties of Au/Fe(51)Pt(49) bilayer thin films,. The samples were prepared in two stages. First, an ordered Fe(51)Pt(49) continuous thin film was sputtered on a quartz substrate. Then an aurum cap layer was deposited onto the Fe(51)Pt(49) film at room temperature, followed by a postannealing at 300-800degreesC to promote the interfacial diffusion. A high coercivity of 23.5 kOe was achieved in the isotropic polycrystalline FePt-based film. Transmission, electron micrographs indicate that the bilayer sample exhibits Ll(0) ordered FePt grains with a diameter of about 20 nm, which were partially isolated by Au phase. We consider that the isolation of FePt Ll(0) grains and the grain refining effect can be two contributory factors for the enhanced coercivity. (C) 2004 American Institute of Physics.

引用

页码：3163 / 3165

页数：3

共 13 条

[1] MAGNETOCRYSTALLINE ANISOTROPY AND ORBITAL MOMENTS IN TRANSITION-METAL COMPOUNDS [J].