Where is the Ag in FePt-Ag composite films?

被引：11
|
作者：
Chen, J. S. [1 ]
Zhou, Y. Z. [1 ]
Sun, C. J. [1 ]
Han, S. -W. [2 ,3 ]
Chow, G. M. [1 ]
机构：
[1] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117574, Singapore
[2] Chonbuk Natl Univ, Dept Phys Educ, Jeonju 561756, South Korea
[3] Chonbuk Natl Univ, Inst Fus Sci, Jeonju 561756, South Korea
来源：
APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 13期
基金：
加拿大自然科学与工程研究理事会;
关键词：
ABSORPTION FINE-STRUCTURE; THIN-FILMS; MAGNETIC-PROPERTIES; TRANSFORMATION; SCATTERING;
D O I：
10.1063/1.3574538
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The miscibility of Ag with FePt composited films was investigated with anomalous x-ray scattering (AXS) and extended x-ray absorption fine structure (EXAFS) at Ag K edge. In the AXS spectra for FePt Bragg peaks, the cusp near Ag K edge was observed, indicating alloying between Ag and FePt in the FePt-Ag thin films. Semiquantitative analysis showed 4.2 at. % and 5.9 at. % Ag were in FePt lattice for the samples with 20 vol % and 30 vol % Ag, respectively. EXAFS studies indicated in the alloyed FePt-Ag phase, Ag replaced the Fe sites in FePt lattice. Most of Ag segregated from FePt and formed fcc phase. This segregated Ag phase only had short range order, which may be due to that segregated Ag had small grain size and/or some disordered Ag phase existed in FePt grain boundaries. (C) 2011 American Institute of Physics. [doi:10.1063/1.3574538]
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页数：3
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