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▲ [13p-S302-1] Two-dimensional Electronic State in a Ferromagnetic L10 MnGa Thin Film with Perpendicular Magnetization
Keywords:Perpendicular magnetization, Electronic state, Angle-resolved photoemission spectroscopy
The in-plane Fermi surface mapping demonstrates a diamond-like Fermi surface (FS) in the kx-ky (the  and  directions) plane. The large area of FS is consistent with the metallic nature of MnGa. This FS was likely independent of photon energy, indicating that the FS originates from two-dimensional (2D) bands. In contrast, the bulk band dispersion below the Fermi level changes with kz. Since MnGa has the three-dimensional L10 crystal structure, the observed 2D electronic state is expected to come from surface states. To the authors’ knowledge, this is the first observation of the band dispersion in a MnGa film with the clean surface using ARPES.
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