The Effect of Disordering on Magnetic Properties of Fe-Al Alloys

Abstract

The results of magnetometric, Mössbauer and XMCD (X-ray Magnetic Circular Dichroism) studies of B2 or DO3–type ordered (25 to 35 at.%Al) and disordered by mechanical activation (35 to 60 at.% Al) Fe-Al alloys are considered. For the description of magnetic characteristics of the studied alloys the validity of local magnetic moments models is discussed. The models suppose that Fe atom local magnetic moments are collinear with magnitude and direction depending on the number of Al atoms in the Fe nearest neighbourhood.

Spin Fluctuations in Disordered Metallic Ferrimagnetic Alloys

“…2 (b), the function m(T) will have two maxima and a minimum. Incidentally, this behavior is not rarely observed in systems Fe-Al, Fe-Si, Fe-Sn systems [7,8].…”

“…Magnetizations of the practical interest alloys such as iron with aluminum, silicon, tin have a complex temperature dependence often wearing a no monotonic character [7,8]. The source of such behavior is the nonequivalence of the magnetic atoms due to the different nearest neighborhoods.…”