Figure 3

Composition-dependent R _C. Gibbs triangles with red circles depicting the fully amorphous state and navy blue circles depicting states with detectable crystalline phases of (a) as-sputtered films, which experienced a cooling rate of 10¹⁰ K s⁻¹, and films that have been laser-treated with scan speeds of (b) 11.5 cm s⁻¹, (c) 9.2 cm s⁻¹, and (d) 6.9 cm s⁻¹. Based on temperature profile simulations (Fig. 2g), the R _C for the amorphous regions are approximately (b) 5.5 × 10⁴ K s⁻¹, (c) 3.4 × 10⁴ K s⁻¹, and (d) 1.7 × 10⁴ K s⁻¹. (e) By compiling the mapped out regions of the amorphous phase as a consequence of multiple laser scan speeds (a–d), contours of R _C as a function of composition can be plotted. The black region represents considered compositions that crystallized, even upon sputtering. The symbols indicate the composition with the highest measured GFA, reported ternary MG compositions with high GFA^21,31 and dotted lines indicating a range, reported binary MG compositions^36,37, the global eutectic composition³⁴, and the composition with the lowest nucleation temperature¹². The compositions in all the Gibbs triangles (a–e) are in at.%.