Abstract
Theoretical calculations on the Raman and infrared (IR) vibrational modes in the tetragonal structure of the Ruddlesden-Popper (RP) phase Sr2BO4 (B = Ti, V, and Mn) have been done in this paper. The Raman and IR vibrational modes have been investigated using Wilson’s GF matrix method for the Sr2BO4 (B = Ti, V, and Mn) compounds having space group I4/mmm and symmetry D4h17 by analyzing the normal coordinates. The measurements of the zone centre vibrational modes have been calculated including three stretching and six bending force constants. In this work, the infrared frequencies for the Sr2MnO4 compound in phase I4/mmm have been assigned first and foremost. There is an extremely strong concurrence between the observed Raman and IR vibrational modes and our calculated results. To determine the role of interatomic forces in the calculated Raman and IR vibrational modes, the potential energy distributions for the Sr2BO4 (B = Ti, V, and Mn) compounds have also been investigated.
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