Abstract
Far‐infrared reflection spectra and results of dielectric measurements of SrTiO3: Mn and SrTiO3: Nd crystals are presented in the paper. Dielectric investigations were conducted at temperature range from 25 K to room temperature in the frequency region between 80 kHz and 11 MHz. Far‐Infrared reflectivity spectra have been measured in the wave‐number region from 150 cm−1 to 4000 cm−1 at temperatures 80 K and 300 K. The numerical analysis of the far‐infrared reflection spectra was made by using a fitting procedure based on factorized form of the dielectric function. The obtained results are compared with those for pure SrTiO3 crystal. The lowest‐frequency phonon mode is found to be strongly influenced by presence of neodymium ions in SrTiO3 single crystal.
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