Fig. 2. For the sample
annealed at 500 C (Fig. 2 (a)), a longitudinal magnetic anisotropy
with out-of-plane coercivity (Hc) of 2.5 kOe was found owing to a
LOF value of 0.138. Although the LOF dramatically enhances
from 0.138 to 0.88 with increasing Ta from 450 to 650 C
(Fig. 2(b)e(c)), the magnetic anisotropy barely evolves from longitudinal
to isotropic state. A significant evolution of magnetic
anisotropy from isotropic to perpendicular behavior was observed
as annealing temperature was raised up to 700 C (Fig. 2(d)). The
FePt film annealed at 700 C shows excellent PMA with out-ofplane
Hc of 9.1 kOe and in-plane Hc of 1.6 kOe. The in-plane MH
loop exhibits a slight hysteresis at low applied field owing to the caxis
distribution in the perpendicular direction. For the highest Ta of
800 C, an excellent PMA with out-of-plane Hc of 10.0 kOe and inplane
Hc of 0.1 kOe was achieved. The (001) textured L10-FePt film
with Ts ¼ 800 C exhibited a high perpendicular