Evidence of a high-spin ferromagnetic state in fcc-structured Fe-Ag (Au) alloys synthesized by ion beam manipulation

Based on the design of interfacial free energy in Fe-Ag (An) multilayered films, metastable Fe40Ag60 and Fe40Au60 alloys were synthesized by ion beam manipulation in the Fe-Ag and Fe-Au systems. The synthesized alloys were identified to crystallize in a large fcc structure with a lattice constant of 0.38-0.39 nm and the associated magnetic moments per Fe atom were measured to be around 2.10-2.30 mu B. The above experimental observations, together with some theoretical analysis, confirm the existence of a high-spin ferromagnetic state in the fcc-structured Fe-containing alloys.