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Raman-active phonons in La4BaCu5O13: polarized Raman spectroscopy and lattice dynamical calculations

Polarized Raman spectra of the perovskite-like compound La4BaCu5O13 were measured and the symmetry of the observed lines was determined. A calculation of the Raman-active phonon modes (10Ag+10Bg+5Eg) within a shell model was additionally used to support the mode assignment and to obtain the ionic vibrational patterns. The observed and calculated frequencies were also compared with the available data for similar structures.