Crystal Structure and Magnetic and Magneto-optical Properties of CoPt, MnPt₃, CrPt₃, MnAl and MnGa Films with Ordered Phase and Their Bit-patterned Media

  • Iwata S.
    Nagoya Industrial Science Research Institute
  • Kato T.
    Institute of Materials and Systems for Sustainability, Nagoya Univ.
  • Oshima D.
    Institute of Materials and Systems for Sustainability, Nagoya Univ.

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タイトル別名
  • Crystal Structure and Magnetic and Magneto-optical Properties of CoPt, MnPt<sub>3</sub>, CrPt<sub>3</sub>, MnAl and MnGa Films with Ordered Phase and Their Bit-patterned Media

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<p>  This paper reviews the crystal structure and magnetic and magneto-optical properties of CoPt, MnPt3, CrPt3, MnAl and MnGa films with an ordered phase as well as dot patterns fabricated on these films. CoPt film grown on a MgO (111) substrate at 300°C had an L11 phase and exhibited a large perpendicular anisotropy. CrPt3 films, which had a (111) orientation and L12 phase, showed a large perpendicular anisotropy due to the magneto-elastic effect. By utilizing the change from L12 to a disordered phase caused by low-dose Kr+ ion irradiation, dot patterns were prepared on CrPt3 film with a flat surface. It was found that a CoGa buffer layer was effective at growing thinner L10 MnAl and MnGa films on a MgO (001) substrate while keeping a (001) orientation. In the case of fabricating MnGa on SiO2/Si substrates, a buffer layer of CoGa/Cr/MgO/Cr/NiTa was necessary to grow L10 MnGa with a (001) orientation.</p>

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