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This article is cited in 6 scientific papers (total in 6 papers)
Semiconductors
Dipole ordering and ionic conductivity in NASICON-Type Na$_{3}$Cr$_{2}$(PO$_{4}$)$_{3}$ structures
A. S. Nogaia, S. Yu. Stefanovichb, A. A. Bushc, D. E. Uskenbayeva, А. А. Nogaia a Saken Seifullin Kazakh AgroTechnical University, Astana, Kazakhstan
b Scientific Research Institute of Physical Chemistry named after L. Ya. Karpova
c MIREA — Russian Technological University, Moscow
Abstract:
The aspects of structure, dipole ordering, and ionic conductivity of the Na$_{3}$Cr$_{2}$(PO$_{4}$)$_{3}$ crystal with the four polymorphic phases ($\alpha$, $\alpha'$, $\beta$, and $\gamma$) have been investigated. The features of the $\alpha$-Na$_{3}$Cr$_{2}$(PO$_{4}$)$_{3}$ crystal structure and its dipole ordering and relaxation polarization in the low-temperature $\alpha$, and $\alpha'$ phases have been refined. The occurrence of Na$_{3}$Cr$_{2}$(PO$_{4}$)$_{3}$ dipole ordering in the $\alpha$ and $\alpha'$ phases and high ionic conductivity in the $\beta$- and $\gamma$ phases is attributed to the structural changes in the rhombohedral $\{[Me_{2}$(PO$_{4}$)$_{3}$]$^{3-}\}_{3\infty}$ crystal frame upon phase transformations $\alpha\to\alpha'$, $\alpha'\to\beta$, and $\beta\to\gamma$. A model for explaining the dipole ordering and ionic conductivity phenomena in Na$_{3}$Cr$_{2}$(PO$_{4}$)$_{3}$ is proposed.
Received: 25.01.2017 Revised: 10.05.2017
Citation:
A. S. Nogai, S. Yu. Stefanovich, A. A. Bush, D. E. Uskenbayev, А. А. Nogai, “Dipole ordering and ionic conductivity in NASICON-Type Na$_{3}$Cr$_{2}$(PO$_{4}$)$_{3}$ structures”, Fizika Tverdogo Tela, 60:1 (2018), 25–32; Phys. Solid State, 61:12 (2019), 23–30
Linking options:
https://www.mathnet.ru/eng/ftt9323 https://www.mathnet.ru/eng/ftt/v60/i1/p25
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