Investigation of a Peculiar Relaxor Ferroelectric: Na 0.5 Bi 0.5 TiO 3

High‐pressure Raman spectroscopy of nano‐structured ABO3 perovskites: a case study of relaxor ferroelectrics

“…Furthermore, the negative wavenumber shift suggests changes in the angle of the BO 6 tilts. More precisely, we propose for the example of NBT (with an orthorhombic high-pressure phase 68 ) that the behavior of the 287 cm 1 band in NBT is probably related to a structural rearrangement that is conditioned by both the restoration of the Ti cation to the center of symmetry ([111] p ! [000]) and a change in the tilt system (a a a !…”

Polarization Rotation and Monoclinic Distortion in Ferroelectric (Bi0.5Na0.5)TiO3–BaTiO3 Single Crystals under Electric Fields

“…Throughout our manuscript, P s and p atom denotes the vectors of spontaneous polarization and atomic polarization, respectively, and the absolute values of these vectors are defined as follows: P s = |P s | and p atom = |p atom |. , which is described in the space group of rhombohedral R3c [17] or monoclinic Cc [61]. As clearly seen in Figure 2d for the BNT-5%BT crystals, apparent 1/2 (o o o) reflections were observed.…”

“…Bismuth sodium titanate (Bi 0.5 Na 0.5 )TiO 3 (BNT) has been recognized as one of the most promising candidates for the lead-free piezoelectric material [5,[10][11][12][13]. To clarify the origin of its ferroelectricity, the crystal structure has been intensively analyzed in detail [14][15][16][17][18][19][20][21][22]. The averaged structure of BNT has been reported to be a rhombohedral structure in space group R3c.…”

Polarization-Modulation Techniques in Near-Field Optical Microscopy for Imaging of Polarization Anisotropy in Photonic Nanostructures

“…The anisotropic absorption (LD, or CD in special cases) can be accessed by removing the quarter-wave plate and the analyzer. Recently the Metripol has been applied to crystallographic investigations of ferroelectric Na 1/2 Bi 1/2 TiO 3 [39], and phase transitions in Pb(Mg 1/3 Nb 2/3 ) (1−x) Ti x O 3 [40] and K 2 Mn 2 (SO 4 ) 3 [41]. An application of Metripol to the screening of birefringent crystals is illustrated in Fig.…”