Hybrid lead-halide perovskites have emerged as an excellent class of photovoltaic
materials. Recent reports suggest that the organic molecular cation is responsible for local …

L. Brillouin predicted inelastic light scattering by thermally excited sound waves in 1922.
Brillouin scattering is a non-contact and non-destructive method to measure sound velocity …

The dielectric response of strontium barium niobate with 61% Sr has been studied from kHz
to THz frequencies by means of several techniques (IR and time domain THz spectroscopy …

In this paper the temperature evolution of the main Raman peak at about 630 cm− 1 has
been studied in order to detect the ferroelectric to paraelectric phase transition in strontium …

The ferroelectric phase transition of nearly stoichiometric Li Ta O 3 crystals with very low
lithium deficiency has been studied by Raman, Brillouin, and neutron scattering. The …

In this study, in situ stress-dependent Raman and Brillouin spectroscopy has been
performed on polycrystalline 0.93 (Na 1/2 Bi 1/2) TiO 3-0.07 BaTiO 3 (NBT-7BT). Brillouin …

Static and dynamic heterogeneity of disordered system is one of the current topics in
materials science. In disordered ferroelectric materials with random fields, dynamic polar …

IR and Raman spectra of strontium barium niobate (SBN) with 35% of Sr were measured in
a broad interval of temperatures (20–800 K). Anomalies in the frequencies and intensities of …

Brillouin spectra have been collected in situ at temperatures up to∼ 1000 K for different
crystallographic directions from two single crystal plates of LaAlO 3 perovskite. Elastic …

The ferroelectric phase transition of uniaxial Ca 0.28 Ba 0.72 Nb 2 O 6 single crystals with a
moderate effective charge disorder was investigated by Brillouin scattering to clarify the …