Synthesis, magnetic properties and magnetostriction of Pr0.5Nd0.5(Fe1-xCox)1.9 cubic Laves alloys

• Published in: Journal of alloys and compounds Vol. 613; pp. 153 - 156
• Main Authors: Hu, C.C., Shi, Y.G., Chen, Z.Y., Shi, D.N., Tang, S.L., Du, Y.W.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.11.2014; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; High-pressure annealing; Magnetic properties; Magnetic properties and materials; Magnetomechanical and magnetoelectric effects, magnetostriction; Magnetostriction; MgCu2-type structure; Physics; MgCu2-type structure; Magnetostriction; High-pressure annealing; Magnetic properties; Cubic lattices; Phase diagrams; Annealing; Curie point; Intermetallic compounds; type structure; Spin orientation; Polycrystals; MgCu; Lattice parameters; High pressure; Magnetization direction; Chemical composition; Laves phases; Saturation magnetization; Crystal structure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2014.05.082

•Pr0.5Nd0.5(Fe1−xCox)1.9 cubic Laves alloys were synthesized by high pressure annealing.•The saturation magnetization increases to a maximum of 103emu/g at x=0.1.•The spin orientation phase diagram was constructed.•The Co concentration of magnetostriction peaks at x=0.1. The structure, magnetic properties and magnetostriction of polycrystalline Pr0.5Nd0.5(Fe1-xCox)1.9 (0⩽x≤0.8) alloys were investigated. It is found that cubic Laves phase becomes the main phase only when the Co concentration is greater than 40 at.% under traditional vacuum annealed method. In contrast, the cubic Laves phase exists over the entire composition range studied in the samples annealed under high pressure. Both the lattice parameter and the Curie temperature decrease with the increasing Co concentration. The saturation magnetization increases into a maximum at x=0.1 and then decreases with further increase in x. The spin orientation phase diagram of Pr0.5Nd0.5(Fe1-xCox)1.9 (0⩽x≤0.4) alloys is constructed to illustrate the arrangement for the easy magnetization direction and crystal structure. The magnetostriction of Pr0.5Nd0.5(Fe1-xCox)1.9 alloys peaks at x=0.1. The Pr0.5Nd0.5(Fe0.9Co0.1)1.9 alloy combines a high magnetostriction with low cost advantage, which may make it potential material for magnetostrictive application.