Antiferromagnetism and Low Magnetostriction in ${\rm Fe}_{100-{\rm x}}{\rm Mn}_{\rm x}$ ( ${\rm x}={38}$ , 42, 46, 50, and 55) Alloys

The structural and magnetic properties of polycrystalline Fe
_100-x
Mn
_x
alloys with x = 38, 42, 46, 50, and 55 atomic percent were investigated after a heat treatment and a cold rolling process. According to X-ray diffraction (XRD), all samples crystallize into a y -phase. For cold rolled alloys x = 38 and 42, XRD analysis using pole figures showed no texture formation whereas cold rolled alloys with x = 46 and 50 exhibited texture components {110} <;1-12> and with x = 55, {011} <;01-1>. Magnetization measurements clearly demonstrate an antiferromagnetic type of ordering. For both the as-cast as well as the cold rolled materials, magnetostriction measurements at room temperature gave nearly zero magnetostriction.