The results of magnetic-susceptibility and low-temperature specific-heat measurements of high-purity Zr and highest-obtainable-purity Hf are presented, together with data for high-purity Ti taken from an earlier publication by the present authors. The observed susceptibility components of the Zr single crystal (${\chi }_{\parallel }={1.65}_6$, ${\chi }_{\perp }={1.09}_2$ μemu/g) confirm the results of another recent measurement; and susceptibility data for Hf single crystals (${\chi }_{\parallel }={0.53}_1$; ${\chi }_{\perp }={0.35}_4$ μemu/g) are reported for the first time. With the aid of the calorimetric data, values of ${\chi }_{\mathrm{orb}}$ are deduced to be 125, 100, and 75 μemu/mole for Ti, Zr, and Hf, respectively. A possible mechanism for the susceptibility temperature dependence in these metals is suggested.

• Received 22 February 1971

DOI:https://doi.org/10.1103/PhysRevB.4.349