Title :
Perpendicular anisotropy of MBE-grown FePt granular films
Author :
Itoh, Tomoya ; Kato, Takeshi ; Iwata, Satoshi ; Tsunashima, Shigeru
Author_Institution :
Dept. of Electron., Nagoya Univ., Japan
Abstract :
The [001] oriented granular FexPt1-x films were MBE-grown on MgO [001] single crystal substrates by means of repetitional deposition and annealing of 0.5 nm layers. The physically isolated granular structure and L10 ordered phase was obtained by annealing above 350°C and the grain size of 20 nm was achieved in 3 nm thick Fe38Pt62 film. The Fe50Pt50 film annealed at 450°C exhibits large perpendicular anisotropy of 2.0×106 J/m3 and large coercivity beyond 1.2 MA/m.
Keywords :
annealing; grain size; granular materials; iron alloys; magnetic epitaxial layers; molecular beam epitaxial growth; perpendicular magnetic anisotropy; 0.5 nm; 20 nm; 3 nm; 450 C; Fe38Pt62; FePt; L10 ordered phase; MBE growth; annealing; deposition; grain size; granular films; granular structure; high-density perpendicular media; molecular beam epitaxy; perpendicular magnetic anisotropy; single crystal substrate; Anisotropic magnetoresistance; Annealing; Grain size; Iron; Magnetic films; Molecular beam epitaxial growth; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Substrates; Temperature; FePt; MBE-growth; granular film; high-density perpendicular media; perpendicular magnetic anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854782
