High temperature magnetic susceptibility of the NbH system

Abstract

The magnetic susceptibility χ(T,x) of various NbHx specimens with 0 ≤ x ≤ 0.8 was measured in the temperature range 275 K ≤ T ≤ 475 K. The susceptibility of the solid solution decreases from 2.84 × 10-5 to 1.25 × 10-5 cm3 g-1 in this hydrogen concentration range and exhibits a marked break at x ≈ 0.6. An estimate of the Pauli paramagnetic spin susceptibility χP for the two limiting concentrations allowed the evaluation of the orbital paramagnetic susceptibility χO. For x = 0 and x ≈ 0.8 the values of χP are 1.05 × 10-5 cm3 g-1 and 0.39 × 10-5 cm3 g-1 respectively and the values of χO are 1.73 × 10-5 cm3 g-1 and 1.08 × 10-5 cm3 g-1 respectively. The magnetic susceptibility decreases by approximately 10% on going from the concentrated solid solution to the monohydride. © 1983.