Amorphous Fe-B alloys in B-Fe-Ag multilayers studied by magnetization and Mössbauer measurements

▶ The magnetic properties of B-Fe-Ag multi-trilayers were investigated. ▶ They are influenced by the Ag thickness when it is below 5 nm. ▶ The formation of amorphous Fe-B alloys of different B content is observed. ▶ It is due to the role of the Ag layer as barrier to the mixing of Fe and B. ▶ The ultra-thin Fe-rich alloy between Ag and B layers shows ferromagnetic properties.