| Autor: |
Won, C., Keavney, D. J., Bader, S. D. |
| Předmět: |
|
| Zdroj: |
Journal of Applied Physics; 3/1/2007, Vol. 101 Issue 5, p053901-N.Pag, 4p, 4 Diagrams, 3 Graphs |
| Abstrakt: |
Cr-dosed FePt films with total thicknesses of 1.8 and 3.6 nm were grown in an ultrahigh vacuum at room temperature and studied by means of the surface magneto-optic Kerr effect, scanning electron microscopy, and x-ray magnetic circular dichroism. After annealing at 550 °C, the L10 and A1 phases are spatially separated. In the L10 phase, round nanoparticles form that are 15±4.8 nm in diameter and possess out-of-plane magnetic easy axes. An addition of <0.01 nm Cr enhances the coercivity (∼0.9 T), which then decreases with additional Cr, and a spin reorientation transition occurs near 0.3 nm Cr dosage as the L10 islands disappear. Segregation of Cr during annealing is believed to be responsible for the formation of round FePt islands and the separation of the L10 islands and planar A1 phase. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
