Magnetic Susceptibility and Low-Temperature Specific Heat of High-Purity Titanium

Abstract

Magnetic susceptibility and low-temperature specific-heat measurements have been made on several specimens of polycrystalline high-purity titanium, and in the case of the former measurement, on four single crystals. The calorimetric results are in good agreement with previously published data. A critically assessed average room-temperature susceptibility based on published magnetic susceptibility values [(3.17 ± 1)% μemu/g] is in good agreement with an average of the present results (3.17 ± ${0.01}_5$ μemu/g). The considerable scatter in the published data (3.0-3.36 μemu/g) is attributed, in part, to the influence of magnetic anisotropy and texture. The magnetic anisotropy of the best of the single crystals measured (${\chi }_{\parallel }-{\chi }_{\perp }=0.52\mathrm{}$ μemu/g) is almost twice as large as that previously reported, and new results for the temperature dependences of ${\chi }_{\parallel }$ and ${\chi }_{\perp }$ in the range 80-400°K are presented. The susceptibility at 0°K is estimated to be approximately 2.9 μemu/g. Combining the calorimetric and magnetic results, and using an empirically derived electronic specific-heat enhancement factor, a value of 0.81 μemu/g was obtained for the spin paramagnetism ${\chi }_s$. Finally, assuming that ${〈{\chi }_{\mathrm{total}}〉}_{\mathrm{av}}\cong {\chi }_s+{\chi }_{\mathrm{orb}}$ (the orbital paramagnetism), we find the latter to be the dominant component of the susceptibility of titanium and equal to ${2.0}_9$ μemu/g.