Fe-doped Na0.47Bi0.47Ba0.06Ti0.98-xV0.02FexO3: Structure correlated vibrational, optical and electrical properties

Understanding the depolarization phenomena in (1−x) Na0.5Bi0.5TiO3. (x) Ba0.85Ca0.15Ti0.90Zr0.10O3 solid solutions using in-situ temperature dependent Raman spectroscopy

“…These modes appear to show distinctly asymmetric doublet feature in the R-III region above 423 K for x = 0.06 which is absent for x = 0 and 0.03 even up to 473 K, while the x = 0.09 showed this feature from 323 K due to the co-existence of R3c and P4bm phase. The E mode at 600 cm −1 in R-III is due to the horizontal compression of the BO 6 octahedra [42]. This mode was redshifted with an increase in temperature (figures 9(i)-(l)).…”

Manganese substitution induced magnetic transformation and magnetoelectricity in SrFe12O19

“…is the frequency (peak position) of the respective peak intensities. The shift in the peak position may depend on many factors [36][37][38][39] including the dopant's ionic radius and molecular mass. Since the respective masses of Fe (55.84 gm/mole) and Mn (54.94 gm/mole) are very close, the effective mass m may be taken constant for all the four compounds, and the force constant (k sc ) is expected to follow the Raman shift o 0 .…”

Structural change from Pbnm to R3̅c phase with varying Fe/Mn content in (1-x) LaFeO3.xLaMnO3 solid solution leading to modifications in octahedral tilt and valence states

“…Hence, individual vibrations were studied using the DFT displacement pattern. Eigenvectors of the phonon modes obtained from DFT calculations gave a better insight into the detailed lattice dynamics [48,93,94]. The calculated and experimental Raman frequencies were compared.…”