Electrical conductivity and magnetic susceptibility of titanium monoxide

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.