Where is the Ag in FePt–Ag composite films?
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 28, 2011
- Source ID
- 10.1063/1.3574538
Entities
People
- C. J. Sun
- G. M. Chow
- J. S. Chen
- S.-w. Han
- Y. Z. Zhou
Organizations
- Jeonbuk National University
- National University of Singapore
- Office of Naval Research
- United States Department of Energy