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Raman scattering spectra of zigzag spin chain TaFe$_{1.25}$Te$_3$ singlecrystal are presented in a temperature range from 80 to 300 K. Nine Ramanactive modes of $A_g$ and $B_g$ symmetry are clearly observed and assigned byprobing different scattering channels, which is confirmed by lattice dynamicscalculations. Temperature dependence of the Raman modes linewidth is mainlygoverned by the lattice anharmonicity. The only deviation from the conventionalbehavior is observed for $A_g$ symmetry modes in a vicinity of the magneticphase transition at $T_N \approx 200$ K. This implies that the electron-phononinteraction weakly changes with temperature and magnetic ordering, whereassmall changes in the spectra near the critical temperature can be ascribed tospin fluctuations.

Small influence of magnetic ordering on lattice dynamics in TaFe$_{1.25}$Te$_3$