NDLI: Concentration Phase Transitions and Structural Disordering in the System of Solid Solutions LixNa1−xTa0.1Nb0.9O3

Content Provider	Springer Nature Link
Author	Palatnikov, M. N. Sidorov, N. V. Mel'nik, N. N. Kalinnikov, V. T.
Copyright Year	2001
Abstract	Concentration phase transitions and structural disordering in the system of solid solutions Li$_{ x }$Na$_{1−x }$Ta$_{0.1}$Nb$_{0.9}$O$_{3}$ (x = 0–0.16) are investigated by the methods of Raman scattering, x–ray structural analysis, and electrophysical measurements. Points of disruption of the translational order in the arrangement of cations at x = 0.05–0.06, 0.09, 0.11, 0.135, and 0.14 that correspond to the boundaries of morphotropic regions and concentration structural anomalies are detected. At points x = 0.11; 0.135, and 0.14, the Raman spectrum in the region of vibrations of the cations located in octahedral and cubooctahedral holes (0–400 cm$^{−1}$) consists of two wide maxima and is practically smeared into the wing of the Rayleigh line, and on the concentration dependences of the electrophysical properties one observes sharp anomalies. The oxygen ochahedrons are distorted less significantly as x changes: the corresponding lines broaden, and new lines demonstrating a symmetry change of the oxygen octahedrons appear only for x ≥ 0.14. It is shown that the system of solid solutions Li$_{ x }$Na$_{1−x }$Ta$_{0.1}$Nb$_{0.9}$O$_{3}$ for x < 0.015 is characterized by the antiferroelectric type of dipole ordering, and for x ≥ 0.015 the structure of a solid solution becomes noncentrosymmetric.
Starting Page	642
Ending Page	648
Page Count	7
File Format	PDF
ISSN	00219037
Journal	Journal of Applied Spectroscopy
Volume Number	68
Issue Number	4
e-ISSN	15738647
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Analytical Chemistry Atomic and Molecular Structure and Spectra
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Condensed Matter Physics

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