Abstract
Magnetostriction materials are a significant kind of magnetic functional materials, while RFe2 (R = rare earth) compounds, especially Tb0.27Dy0.73Fe2, with cubic Laves phase structure, are the most famous. In this work, polycrystalline Prx(Tb0.27Dy0.73)1–xFe1.95 (x = 0, 0.05, 0.10, 0.15, 0.2, 0.25) alloys were synthesized to explore the influence of adding Pr on the structural, magnetic and magnetostrictive properties of Tb0.27Dy0.73Fe1.95. The results show that Prx(Tb0.27Dy0.73)1–xFe1.95 alloys can form the C15 Laves phase when x ≤ 0.2. Meanwhile, the samples with a Pr content of up to 0.1 exhibit a higher saturation magnetostriction compared to the Pr-free sample. As the content of Pr in Prx(Tb0.27Dy0.73)1–xFe1.95 rises from 0 to 0.1, the saturation magnetostriction, λs, improves from 1057 ppm to 1147 ppm. The apparent enhancement of the magnetostrictive property of Tb0.27Dy0.73Fe1.95 reveals the great potential of (Pr,Tb,Dy)Fe2 to become a widely-used magnetostriction material. Larger lattice distortion of the material itself leads to an increase in magnetostriction.
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