Magnetic susceptibility of (Zr80Fe20)1-xHx metallic glasses

The magnetisation of hydrogen-doped (Zr80Fe20)1-xHx metallic glasses has been measured in the temperature range 1.7-100 K for various dopant concentrations. The system is paramagnetic with magnetic susceptibilities that are only weakly temperature dependent down to about 25 K 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 100 K, χ(100 K), 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