Perpendicular uniaxial magnetic anisotropy of Fe/sub 16/N/sub 2/[001] single crystal films grown by molecular beam epitaxy

The uniaxial magnetic anisotropies by torque measurement have been measured for Fe/sub 16/N/sub 2/[001] single crystal films grown by molecular beam epitaxy (MBE). It has been found that Fe/sub 16/N/sub 2/[001] films exhibits perpendicular uniaxial anisotropy which makes the easy axis along the [001] direction, and those anisotropy constants K/sub U1/ and K/sub U2/ for Fe/sub 16/N/sub 2/ were 1.6/spl times/10/sup 7/ and 0.4/spl times/10/sup 7/ erg/cm/sup 3/ respectively. Those K/sub U1/ and K/sub U2/ for Fe/sub 16/N/sub 2/ were constant in the thickness range from 34 to 83 nm. The ferromagnetic resonance of Fe/sub 16/N/sub 2/[001] single crystal films have been measured. The saturation magnetic flux densities, 4/spl pi/M/sub s/ for Fe/sub 16/N/sub 2/ measured by the magnetic torques and resonance fields agreed well with the values measured with a vibrating sample magnetometer (VSM).