ablation. At low growth rate (≃ 0.4 Å∕ s), the film morphology changes from a self-similar
fractal to nanodots as the deposition temperature is raised from 700 to 800 C. While the
nanodots are L 1 0 ordered phase with out-of-plane c axis and coercivity H c⊥≃ 30 kOe,
the fractals have a nonzero, in-plane c-axis component of the L 1 0 phase. The large lattice
mismatch between (001) Sr Ti O 3 and the ac∕ bc plane of L 1 0 imparts tensile strain to the …