Inherent optical behavior and structural variation in Na0.5Bi0.5TiO3-6%BaTiO3 revealed by temperature dependent Raman scattering and ultraviolet-visible transmittance

Abstract

Articles you may be interested inLarge strain response based on relaxor-antiferroelectric coherence in Bi0.5Na0.5TiO3-SrTiO3-(K0.5Na0.5)NbO3 solid solutions

Temperature-dependent lattice dynamics and electronic transitions in0.93Pb(Zn1/3Nb2/3)Zhang1, Tong2, Zhu3 et al. 2015Phys. Rev. B250101View full textAdd to dashboardCite

“…The temperature dependence for hν 3 is not sensitive to phase transformations. It can be well explained by the Bose-Einstein model, which takes into account the electron-phonon interaction and is written as [32][33][34][35][36] hν k (T ) = hν k (0) − 2a ν /(e ν /T − 1). For PZN-7%PT single crystal, the transition energy at absolute zero hν k (0) is about 3.73 eV, the strength of the electronphonon interaction a ν is 0.22 eV, and Einstein temperature ν is 504 K, respectively.…”

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

“…Hence, it is difficult to distinguish the two phases in the Raman spectra for NBT. The Raman spectra for all the samples at all temperatures can be divided into four major regions containing seven major phonon modes (figures S2-S5) [9,[37][38][39][40]. The first region (R-I) is in the range of 50-200 cm −1 and represents the A-O vibrations.…”

High Surface Area VOx/TiO2/SBA-15 Model Catalysts for Ammonia SCR Prepared by Atomic Layer Deposition

“…Major features include the band at around 450-550 cm −1 associated with four-membered rings (D 1 ), and the broad band at around 600-900 cm −1 assigned to symmetrical Si-O-Si stretching and three-membered rings (D 2 ) [63]. The band located at 353 cm −1 is assigned to bending in Si-O-Si bridges [64], whereas the band at 286 cm −1 has been attributed to the A 1 mode of TiO 6 octahedra [65,66]. The small feature at 1064 cm −1 is characteristic of silica TO phonons [67], whereas the weak Raman peak observed at 1122 cm −1 for TiO 2 /SBA-15 is attributed to framework Ti-O-Si species [68].…”