Magnetic phase diagram of ferromagnetic shape memory alloys Ni2MnGa1-xFex

• Published in: Journal of alloys and compounds Vol. 591; pp. 280 - 285
• Main Authors: Hayasaka, Y., Aoto, S., Date, H., Kanomata, T., Xu, X., Umetsu, R.Y., Nagasako, M., Omori, T., Kainuma, R., Sakon, T., Nishihara, H., Ziebeck, K.R.A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 05.04.2014; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Heusler alloy; Magnetic moment; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); Magnetic phase diagram; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Martensitic transformations; Martensitic transition; Materials science; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Magnetic phase diagram; Martensitic transition; Heusler alloy; Magnetic moment; Differential scanning calorimetry; Phase diagrams; Nickel alloys; Phase transformations; Martensitic transformations; Magnetic moments; Iron alloys; Magnetically soft alloy; Gallium alloys; Magnetic transitions; Shape memory alloy; Magnetic permeability; Manganese alloys; Heusler alloys; Chemical composition; Ferromagnetic-paramagnetic transitions; Transition element alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.12.035

•Magnetic phase diagram was determined for ferromagnetic shape memory alloys Ni2MnGa1−xFex.•Magnetostructural transition was found to exist between 0.275⩽x⩽0.375.•The concentration dependence of the magnetic moment per formula unit at 5K was determined. Permeability and differential scanning calorimetry measurements were carried out on Ni2MnGa1-xFex(0⩽x⩽0.40). On the basis of the experimental results, the phase diagram in the temperature–concentration plane was determined. The characteristics of the determined phase diagram are similar to those of the phase diagrams of Ni2+xMn1-xGa,Ni2Mn1-xCuxGa and Ni2MnGa1-xCux systems, where the magnetostructural transition between the paramagnetic austenite phase (Para-A) and ferromagnetic martensite phase (Ferro-M) occurs. Furthermore, the concentration dependence of the magnetic moment per formula unit, μs, at 5K for Ni2MnGa1-xFex(0⩽x⩽0.375) is also reported.