(Fe57 Pt43)100-x Cux ternary films with x = 0-4 at.% were prepared on Corning 7059 glass by dc magnetron sputtering in order to investigate the effect of Cu addition on the transformation rate of FePt alloy films. The structural and chemical analysis revealed that Cu was very effective in promoting the transformation to the L10 ordered phase and to suppress the grain growth of the L10 ordered phase when films were annealed at 400 °C-700 °C in vacuum. During the annealing, Cu atoms diffused onto the film surface, probably yielding many defects remain inside the film. This Cu diffusion may be the reason for the rapid transformation.
- FePt film
- L1 structure
- Order-disorder transformation
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)