Abstract
The properties of Na x Li1–x FeGe2O6 (x = 0.1–0.9) solid solutions obtained via a solid-phase synthesis have been measured by X-ray diffraction, calorimetry, and magnetic method. The order–disorder transformations in low-dimensional Na x Li1–x FeGe2O6 (x = 0.1–0.9) spin systems with predominately antiferromagnetic exchange interaction have been revealed in the low-temperature susceptibility dependences. The study of thermal and physical properties has confirmed that substituting the sodium ions with the lithium ones induces the first-order structural phase transitions of the displacement type which are characterized by a symmetry change in monoclinic crystals from high-temperature C2/c space group to low-temperature P21/c space group.
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Original Russian Text © T.V. Drokina, G.A. Petrakovskii, M.S. Molokeev, V.S. Bondarev, D.A. Velikanov, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 7, pp. 1316–1324.
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Drokina, T.V., Petrakovskii, G.A., Molokeev, M.S. et al. Synthesis and study of structural, thermodynamic, and magnetic properties of Na x Li1–x FeGe2O6 (x = 0.1–0.9) compounds. Phys. Solid State 58, 1361–1370 (2016). https://doi.org/10.1134/S1063783416070143
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DOI: https://doi.org/10.1134/S1063783416070143