This article is cited in 5 papers

Phase transitions

Thermal dissociation of intercalated titanium selenides Fe$_x$TiSe$_2$ ($x$ = 0.10, 0.25, 0.50)

A. N. Titov^a, L. N. Zelenina^b, T. P. Chusova^b, E. G. Shkvarina<sup>a

a</sup> Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
^b Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: Using static tensimetry, the selenium pressure during dissociation of intercalated compounds Fe$_x$TiSe$_2$ has been measured in a temperature range of stability of the homogeneous material and in the region of decomposition caused by thermal expansion of the polaron band. It has been shown that covalent centers in the stability region of the homogeneous state, which are stabilized by the polaron state of conduction electrons, behave as the effective oxidants lowering the Fermi level. Broadening of the polaron band in the region of a high iron concentration leads to weakening the oxidizing influence of polarons. Iron selenides are formed during the decomposition of intercalated compounds, which leads to an essential non-quasi-binarity of the Fe–TiSe$_2$ system.

Received: 23.04.2012

 English version: Physics of the Solid State, 2012, 54:12, 2481–2485

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