Further evidence on the effect of magnetism on lattice vibrations: The case study of sigma-phase Fe0.525Cr0.455Ni0.020 alloy

Sigma-phase Fe0.525Cr0.455Ni0.020 alloy was studied by means of M\\"ossbauer\nspectrometry in the temperature range of 5-293 K. The average center shift,\n<CS>, determined from the recorded M\\"ossbauer spectra was shown to\nsignificantly deviate from the Debye model in the temperature range below ca.\n50 K i.e. in the magnetic state of the sample. The deviation is obviously due\nto the effect of magnetism on the lattice dynamics of the studied sample.\nAnalysis of the <CS>-data in the paramagnetic phase in terms of the Debye model\nyielded the value of 437(7) K for the Debye temperature.\n