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2009•Journal of MagneticsOpen access

Perpendicular Magnetization of FePt Alloy Films Epitaxially Grown on Si(100)

Jae-Young Ahn, Nyun Jong Lee, Tae Hee Kim

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Abstract

This study examined the structure and perpendicular magnetization of FePt films grown on Pt/Fe/MgO(100) buffered Si(100) substrates by molecular beam epitaxy. The [Fe(0.17nm)/Pt(0.2nm)] $_N$ multilayers were prepared at room temperature to form a $L1_0$ -FePt phase after vacuum annealing. Perpendicular magnetic anisotropy (PMA) was observed in the films after at least 15 repetitions (N = 15) of Fe/Pt deposition and annealing at $300{^{\circ}C}$ for 1 hour. Careful structural analysis of the films was carried out by x-ray diffraction and high-resolution transmission electron microscopy. These results will assist in the development of the low temperature $L1_0$ - FePt deposition process, which will be essential for future extremely high density magnetic recording media.

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This study examined the structure and perpendicular magnetization of FePt films grown on Pt/Fe/MgO(100) buffered Si(100) substrates by molecular beam epitaxy. The [Fe(0.17nm)/Pt(0.2nm)] $_N$ multilayers were prepared at room temperature to form a $L1_0$ -FePt phase after vacuum annealing. Perpendicular magnetic anisotropy (PMA) was observed in the films after at least 15 repetitions (N = 15) of Fe/Pt deposition and annealing at $300{^{\circ}C}$ for 1 hour. Careful structural analysis of the films was carried out by x-ray diffraction and high-resolution transmission electron microscopy. These results will assist in the development of the low temperature $L1_0$ - FePt deposition process, which will be essential for future extremely high density magnetic recording media.

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Available abstract

This study examined the structure and perpendicular magnetization of FePt films grown on Pt/Fe/MgO(100) buffered Si(100) substrates by molecular beam epitaxy. The [Fe(0.17nm)/Pt(0.2nm)] $_N$ multilayers were prepared at room temperature to form a $L1_0$ -FePt phase after vacuum annealing. Perpendicular magnetic anisotropy (PMA) was observed in the films after at least 15 repetitions (N = 15) of Fe/Pt deposition and annealing at $300{^{\circ}C}$ for 1 hour. Careful structural analysis of the films was carried out by x-ray diffraction and high-resolution transmission electron microscopy. These results will assist in the development of the low temperature $L1_0$ - FePt deposition process, which will be essential for future extremely high density magnetic recording media.

Key concepts: Materials science, Annealing (glass), Epitaxy, Magnetization, Molecular beam epitaxy, Transmission electron microscopy, Alloy, Perpendicular

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