Abstract: In stoichiometric GeTe-Sb$-2$/Te$-3$/ films, reversible phase change optical recording materials, Sb addition is used widely in order to improve the crystallization speed, the data retention time, and the stability of cyclic operation, but its mechanism is not clear. V-VI compounds (GeTe, SnTe) are well known as compounds in which the ferroelectric structural phase transition occurs. The dielectric constant $epsilon$-0$/ changes largely due to a change in the short-range order of weakly bound nearest neighbors in the crystal to more strongly bound nearest neighbors in the amorphous phase. Therefore, it is necessary to discuss the effect of Sb addition in the stoichiometric GeTe-Sb$-2$/Te$-3$/ composition upon the dynamic properties of crystallization and the dielectric constant change $Delta $epsilon$-0$/ based on the ferroelectric phase transition. !9
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