Magnetic Properties of Liquid Gd-TM (TM = Mn, Fe, Co, Ni) Alloys

Liquid Gd-TM (TM = Mn, Fe, Ni) alloys on the TM- rich side have relatively small and negative temperature coefficients of the magnetic susceptibility chi, which become large and negative with increasing Gd content. The large and negative temperature coefficient of chi for liquid Co gradually weakens at up to 70 at.% Co with the addition of Gd. Liquid Gd and GdcCo1-c alloys with c >= 0.5 also have a relatively large and negative temperature coefficient of chi. Liquid Gd-TM alloys on the Gd- rich side obey the Curie law. The magnetic susceptibilities of liquid Gd-Fe and Gd-Co alloys exhibit Curie-Weiss behavior on the TM- rich side. The dependence of. on the composition for liquid Gd-TM ( TM = Mn, Fe, Ni) alloys gradually increases with the Gd content, and that for liquid Gd-Co alloys has a minimum at the composition of 20 at.% Gd. The dependences of chi(3d) and chi(4f) on the composition due to the 3d- and 4f-electrons were analyzed by subtracting the corresponding data for liquid La-TM alloys from chi for the liquid Gd-TM alloys.