Magnetic and Resonant Properties of Fe–Bi Films

Abstract

Film structures in the Fe-Bi system have been studied experimentally. The magnetic state of the two-layer structures is shown by electron magnetic resonance to be dependent on the order of depositing magnetic and nonmagnetic layers. The three-layer structures demonstrate the effect of the exchange bias, the value of which is dependent on the bismuth interlayer thickness.

Bismuth-based liquid metals: advances, applications, and prospects

“…One of the manifestations of this effect is the appearance of exchange bias, influenced by the thickness of the nonmagnetic semimetallic intermediate layer. 65 If the Fe layer thickness is less than 1.5 nm, the Fe/Bi film will have perpendicular magnetic anisotropy and the magnetization intensity lies in the plane of the film where the Fe layer thickness is larger. 66 It follows that the preparation process of the film is the key to its magnetic formation.…”