Magnetic Properties on FeAl Stripes and Dots Induced by Nanosecond Pulsed Laser Irradiation

  • Kaiju H.
    Research Institute for Electronic Science, Hokkaido Univ.
  • Yoshida Y.
    Center for Advanced Research of Energy and Materials, Hokkaido Univ. Creative Research Institution Sousei, Hokkaido Univ.
  • Watanabe S.
    Center for Advanced Research of Energy and Materials, Hokkaido Univ.
  • Kondo K.
    Research Institute for Electronic Science, Hokkaido Univ.
  • Ishibashi A.
    Research Institute for Electronic Science, Hokkaido Univ.
  • Yoshimi K.
    Graduate School of Engineering, Tohoku Univ.

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抄録

  We investigate magnetic properties of FeAl stripes and dots formed on the surface of Fe52Al48 induced by nanosecond pulsed laser irradiation. According to the in-plane magneto-optical Kerr effect (MOKE) measurements, the magnetization reversal in FeAl stripes can be explained by the domain-wall (DW) motion model, indicating that the magnetization rotates incoherently. In contrast, the in-plane and polar MOKE measurements reveal that the magnetic easy axis of the FeAl dots exists along the out-of-plane direction and the coercive force Hc shows as large as 1 kOe. These results indicate that the nanosecond pulsed laser irradiation can be expected to serve as a useful tool for obtaining magnetic nanostructures and creating high-Hc materials.

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