• Watanabe Masato
    The Research Institute for Electric and Magnetic Materials, 2–1–1 Yagiyama–minami, Taihaku–ku, Sendai 982, Japan
  • Homma Motofumi
    Faculty of Engineering, Tohoku University, Aoba, Aramaki, Aoba–ku, Sendai 980–77, Japan

書誌事項

タイトル別名
  • Perpendicular Magnetization of Epitaxial FePt(001) Thin Films with High Squareness and High Coercive Force.
  • Perpendicular Magnetization of Epitaxia

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説明

Perpendicular magnetized epitaxial FePt(001) thin films were prepared by RF-magnetron sputtering. The long range order parameter S of the FePt layer was found to be ~ 0.9. Very narrow X-ray rocking curves ( FWHM<1°) of the FePt(002) and Pt(200) peaks indicate that both layers are essentially single crystalline. With increasing Pt buffer layer thickness d Pt, the squareness M r/M S and coercive force H C were found to increase to 100% and 7.2 kOe, respectively. The FePt(001) thin film has a |0.58°| peak at a photon energy of 2.0 eV (630 nm wavelength) in the polar magnetooptical Kerr rotation θ K spectrum, which does not agree with that of the polycrystalline FePt ordered alloy.

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