Raman Scattering in Pb(MoO4)x(WO4)1−x Mixed Crystals

Date

1982-01-01

Author

Efendiev, Sh.M.
Darvishov, N.G.
Nagiev, V.M.
Hasanlı, Nızamı
Gabrielyan, V.T.
Nikogosyan, N.S.

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Subject Keywords

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/41740

Journal

physica status solidi (b)

DOI

https://doi.org/10.1002/pssb.2221100148

Collections

Department of Physics, Article

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RAMAN-SPECTROSCOPY OF SOFT AND RIGID MODES IN FERROELECTRIC TLINS2 BURLAKOV, VM; RYABOV, AP; YAKHEEV, MP; VINOGRADOV, EA; MELNIK, NN; Hasanlı, Nızamı (Wiley, 1989-06-01) Low‐frequency Raman spectra of a TlInS2 single crystal in the vicinity of a ferroelectric phase transition are reported. In the ferroelectric phase a soft mode interacting with some rigid modes is observed. The temperature dependence of the soft mode frequency is found to be proportional to (Tc – T)1/2. An unusual behaviour of the rigid mode (ω = 20 cm−1) is observed. This fact is interpreted in terms of inherent lattice defects which cause nonhomogeneous broadening.
Raman linewidths calculated as a function of temperature in NaNO(2) KARACALİ, HUSEYİN; Yurtseven, Hasan Hamit; Kiraci, Ali (Wiley, 2009-05-01) The temperature dependence of the damping constant is calculated for some Raman modes in NaNO(2) using the soft mode-hard mode coupling model and the energy fluctuation model. The damping constant is fitted to the measured Raman bandwidths of those modes, which is well described by the soft mode-hard mode coupling model. The values of the activation energy are extracted from the damping constant for the Raman modes, which are much greater than k(B)T(C) = 0.04 eV for NaNO(2) close to the transition temperatu...
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Citation Formats

S. M. Efendiev, N. G. Darvishov, V. M. Nagiev, N. Hasanlı, V. T. Gabrielyan, and N. S. Nikogosyan, “Raman Scattering in Pb(MoO4)x(WO4)1−x Mixed Crystals,” physica status solidi (b), pp. 0–0, 1982, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41740.