MAGNETIC-PROPERTIES OF THE ANATASE PHASE OF TIO2

Magnetic susceptibility measurements of anatase single crystals of TiO 2 are reported for the first time. The anatase single crystals behave like a large gap semiconductor with a shallow donor level at 5 meV. Th e susceptibility measured by ESR is due to electrons localized on the donor state while the static susceptibility reveals the carriers therm ally excited into the conduction band. The lattice contribution of the susceptibility is dominated by a net Van Vleck paramagnetism surprisi ngly lower in magnitude than in the rutile phase.