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CONDENSED MATTER

Electrical conductivity and magnetic susceptibility of titanium monoxide

A. A. Valeeva, A. A. Rempel, A. I. Gusev

Institute of Solid State Chemistry, Urals Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: Conductivity and magnetic susceptibility of disordered cubic titanium monoxide TiO$_y$ ($0.920 \leq y \leq 1.262$) are studied. Temperature dependences of the conductivity of TiO$_y$ monoxides with $y\leq1.069$ are described by the Bloch–Grüneisen function with Debye temperature $400$–$480$ K, and temperature dependences of the susceptibility include Pauli paramagnetism of conduction electrons. The behavior of conductivity and susceptibility of TiO$_y$ with $y\geq1.087$ is typical of semiconductors with nondegenerate charge carriers obeying Boltzmann statistics. The band gap $\Delta E$ between the valence and conduction bands of TiO$_y$ ($y\geq 1.087$) is $0.06$–$0.17$ eV, and effective mass of charge carriers is equal to $7$–$14$ electron masses.

PACS: 72.80.Ga, 75.20.-g, 77.84.Bw

Received: 07.05.2001

 English version: Journal of Experimental and Theoretical Physics Letters, 2001, 73:11, 621–625

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