Abstract
Changes in the crystal structure of the Ni0.5TiSe2 intercalated compound have been thoroughly investigated using powder X-ray diffractometry in the temperature range from 93 to 700 K. It has been shown that upon heating to the temperature of about 400 K, this compound undergoes a phase transition from the monoclinic structure described by space group I12/m1 to the trigonal structure \((P\bar 3 m1)\), which is associated with the disorder in the subsystem of intercalated Ni atoms. The supercooling effect with the formation of the metastable state, which is characteristic of first-order phase transitions such as melting and crystallization, has been revealed in the region of the order-disorder phase transition, and the anomalous behavior of the resistivity has been observed.
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Original Russian Text © N.V. Selezneva, V.G. Pleshchev, N.V. Baranov, 2014, published in Fizika Tverdogo Tela, 2014, Vol. 56, No. 12, pp. 2293–2297.
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Selezneva, N.V., Pleshchev, V.G. & Baranov, N.V. Order-disorder structural phase transition in the system of intercalated Ni atoms in the Ni0.5TiSe2 compound. Phys. Solid State 56, 2374–2379 (2014). https://doi.org/10.1134/S1063783414120282
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DOI: https://doi.org/10.1134/S1063783414120282