[14p-P10-1~98] 10 Spintronics and Magnetics（Poster）

▲ [14p-P10-21] MnGa polycrystalline ultrathin films with perpendicular magnetic anisotropy prepared on thermally-oxidized Si substrate

〇(PC)Atsuo Ono¹, Kazuya Suzuki¹, Reza Ranjbar¹, Shigemi Mizukami¹ (1.WPI-AIMR Tohoku Univ.)

Keywords:spintronics, perpendicular magnetic anisotropy, Mn-based alloys

Here we investigate the structure and magnetic properties of polycrystalline MnGa films on a CoGa buffer layer prepared on thermally-oxidized Si substrate. The stacking structures of Si / SiO₂ substrate / MgO(10) / Cr(40) / CoGa(30) / MnGa(t_MnGa=1-30 nm) / Mg(0.4) / MgO(5) / Ta(3) (thickness is in nm) were prepared using a magnetron sputtering. The 2θ-θ profiles of X-ray diffraction show the only (002) peaks of the MnGa films with different thicknesses was occurred, indicating that the (001)-textured MnGa films was crystalized. The saturation magnetization and PMA energy of the 3-nm-thick MnGa film were evaluated to be about 200 emu/cm³ and 3 Merg/cm³, respectively, which measured using vibrating sample magnetometer (VSM).