Magnetic susceptibility of (Zr sub 80 Fe sub 20 ) sub 1-x H sub x metallic glasses

The magnetisation of hydrogen-doped (Zr sub(80)Fe sub(20)) sub(1-x)H sub(x) metallic glasses has been measured in the temperature range 1.7-100K for various dopant concentrations. The system is paramagnetic with magnetic susceptibilities that are only weakly temperature dependent down to about 25K and hydrogen concentration x < 0.03. For a larger hydrogen concentration, x=0.1, the magnetic susceptibility becomes strongly temperature dependent and shows the Curie-Weiss behaviour. It has been also found that the magnetic susceptibility at 100K, Chi (100K), decreases for hydrogen concentration x=0.03, while for x=0.1 it increases again. This behaviour is primarily due to the increased contribution of the Fe 3d-electronic states to the density of states at the Fermi level and to the formation of spin fluctuations and magnetic moments on the Fe sites at hydrogen concentrations x > 0.03. The form and magnitude of the observed temperature dependence of the magnetic susceptibility are well accounted for by the sum of the Curie-Weiss term and the quantum corrections to the susceptibility. copyright 2001 Elsevier Science B.V. All rights reserved.