Electron Paramagnetic Resonance of Manganese in TiO2

The paramagnetic resonance spectrum of a manganese-doped single crystal of Ti${\mathrm{O}}_2$ in its rutile structure was investigated at a frequency of 9.505 kMc/sec at room temperature. The following results were obtained: The manganese atoms replace the ${\mathrm{Ti}}^{4+}$ ions in the rutile and exist as tetravalent ions having a spin value of $S=\frac{3}{2}$ and strong admixtures of covalent bonds to their six oxygen neighbors. The parameters of the spin Hamiltonian were determined to be $g=1.990\mathrm{}$, $\mathrm{}\left|D\right|=12.1\mathrm{}$ kMc/sec, and $\mathrm{}\left|E\right|=0.388\mathrm{}$ kMc/sec. Within the accuracy of this experiment the magnetic hyperfine structure was isotropic and could be described by $\mathrm{}\left|A\right|=215\mathrm{}$ Mc/sec.