Abstract
FePt thin films have been prepared at different substrate temperatures by DC magnetron co-sputtering. The films change from a disordered fee structure to a L10 fct structure with temperature. The magnetic and the magneto-optical properties of those FePt films have been studied. The dependence of spectral changes on the formation of a chemically-ordered L1 0structure is observed in the polar magneto-optical Kerr rotation. In the spectra, the ultraviolet peak located in the high-energy range (4.0 - 4.5 eV), which is related to electronic transitions on Pt atomic sites, is observed for all samples. On the contrary, the peak related to transitions on Fe atomic sites, which is located in the low-energy range (1.5 - 2.0 eV), is only observed for highly chemically-ordered samples. Compared with the spectra for the L10 structure of FePt films prepared by using molecular beam epitaxy, the infrared peak related to Fe sites is shifted to low energy.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2099-2102 |
| Number of pages | 4 |
| Journal | Journal of the Korean Physical Society |
| Volume | 49 |
| Issue number | 5 I |
| State | Published - Nov 1 2006 |
Keywords
- Chemical ordering
- Co-sputtering
- FePt film
- Magneto-optical spectra