Abstract
We investigated the compositional dependence of microstructure and the coercivity of FePt-M-B(M{double bond, short}Zr, Nb, La) sputter-deposited films. As-deposited ternary FePt-B films have an amorphous structure and low coercivity. After annealing at 923 K for 1.8 ks, ordered L10 FePt nanoparticles were observed. With the adding of the fourth element of M(Zr, Nb, La), the as-deposited films were also of the amorphous structure. After annealing at the same condition, the films show high coercivity of ∼520 kA/m and ordered L10 FePt phase are found. Compared with the ternary FePt-B films, the structure, coercivity and grain size vary with the additional element (M) and the compositions. The effects of additive elements on transformation to the L10-ordered phase have been studied.
Original language | English |
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Pages (from-to) | 2527-2528 |
Number of pages | 2 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 310 |
Issue number | 2 SUPPL. PART 3 |
DOIs | |
Publication status | Published - 2007 Mar |
Keywords
- Granular film
- L1 ordering
- Sputtering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics