Magnetic Susceptibility of Al2O3: Ti3+

Abstract

Results of a temperature-dependent study of the magnetic susceptibility and anisotropy for ${\mathrm{Al}}_2$ ${\mathrm{O}}_3$: ${\mathrm{Ti}}^{3+}$ are reported for the first time. Measurements were made using a Faraday balance and a sensitive torsion balance over the temperature range 1-350 °K. The data could be described using the previously observed spectroscopic parameters, and estimates of the Van Vleck susceptibility for all three trigonal states are obtained. The value $g_{\perp }^2-g_{\parallel }^2=-0.40\mathrm{}$ for the second excited state differs in sign from Macfarlane's calculated value.