MAGNETIC SCALING PROPERTIES OF THE CONCENTRATED SPIN GLASS Fe₆₀Ru₂₀B₂₀

The magnetic properties of the metallic glass Fe₆₀Ru₂₀B₂₀ have been investigated in the vicinity of the paramagnetic to spin glass transition temperature (T_g). Both the variation of the linear and the non-linear terms with temperature have been studied. Like for other concentrated spin glasses, the field-dependent non-linear term has been described by means of a scaling function. As previously demonstrated for the system _a-Fe_xNi_75–x(PBAl)₂₅, analyzing several isotherms around T_g, it can be precisely located from the peaks in χ0 y χH (for a fixed B) , the latter being normally sharper. Tg has been found to be ≈ 70 K. The temperature dependence for χ0 implies a Curie behavior far from T_g, divergence at closer temperatures and saturation at T = T_g.