Macrosegregation in vertical Bridgman grown Ge1−xSix alloy with large melt volume: Limit of complete mixing

► Vertical Bridgman growth of GeSi alloy with an average Si composition of 15 atom% was performed on large melt volume. ► Axial Si composition is described by a one-dimensional model including complete mixing and equilibrium Si segregation coefficient. ► Excellent agreement between theory and experiment shows that the GeSi phase diagram in the Ge-rich region is determined accurately.