Raman scattering spectra of ceramics, films, and superlattices of ferroelectric perovskites: A review

Ferroelectric and structural instability of (Pb,Ca)TiO3 thin films prepared in an oxygen atmosphere and deposited on LSCO thin films which act as a buffer layer

“…For example, linewidths and broader optical phonon frequencies are sensitive to microstrutural changes, stress, thickness, temperature and pressure; this result corroborates the XRD analysis. In addition, the Raman spectrum at room temperature is in agreement with the literature and shows all Raman active modes [36]. By fitting measured spectra and decomposing the fitted curves into individual Lorentzian components, the peak position of each component (i.e., the natural frequency of each Raman active mode) was obtained for PCT10/LSCO, PCT10/ platinum samples and PCT10 bulk powder for comparison.…”

Low-temperature route to metal titanate perovskite nanoparticles for photocatalytic applications

“…The Raman spectrum of calcined CaTiO 3 does not exhibit any bands, indicating a disordered structure [19]. Based on the selection rules no first-order Raman active vibration frequencies are allowed for cubic MTiO 3 [20]. However, in the Raman spectra of as-prepared MTiO 3 (Sr, Ba) five bands can be observed at 179, 305, 517, 715, and 806 cm -1 .…”

Effects of CaO–B2O3 glass addition on the low-temperature sintering and cation ordering in Sr La(1−)Ti Al(1−)O3 ceramics

“…The strong band near 790 cm À1 named A 1g mode, is assigned to the BO 6 symmetric stretching vibration [37]. And the bandwidth of A 1g mode can be considered as an indication of the B-site ordering degree in the complex perovskites [38]. The narrower the bandwidth exhibits, the higher degree the B-site ordering structure is.…”