Structural and Magnetic Characterization of Fe–Mn–Al–Ni Pseudo-Heusler Alloy

In this paper, the production and structural, superelastic, thermoelastic, and magnetic properties of melt-spun Fe
_43.5
Mn
₃₄
Al
₁₅
Ni
_7.5
alloy have been investigated with the aim to employ it for contactless strain measurements. Structural properties were observed by scanning electron microscope and X-ray diffraction, which shows the existence of two phases (fcc and bcc). Magnetic properties were studied by vibrating sample magnetometer and LCR-Bridge. Superelasticity was investigated by straining a ribbon. Measured superelastic strain at room temperature was ~0.5%. Within that range we achieved 12% change of permeability that arises from the structural transition between two recognized phases. It proves that Fe
_43.5
Mn
₃₄
Al
₁₅
Ni
_7.5
superelastic alloy is a promising potential contactless sensor of strain.