Abstract
The structural and magnetoelastic properties of (Tb0.3Dy0.7)1−x(Pr0.5Nd0.5)xFe1.93 (0 ≤ x ≤ 0.20) polycrystalline alloys have been investigated by means of X-ray diffraction (XRD), a vibrating sample magnetometer and a standard strain gauge technique. A single (Tb,Dy,Pr,Nd)Fe2 Laves phase with a cubic MgCu2-type structure is formed when x ≤ 0.12, while a small amount of impurities appear when x ≥ 0.15. The easy magnetization direction at room temperature is detected toward <111> axis. The analysis of XRD, magnetization and magnetostriction shows that the Pr and Nd elements joint introduction into (Tb,Dy)Fe2 system can reduce the magnetocrystalline anisotropy and improve the magnetoelastic properties. The (Tb0.3Dy0.7)0.88(Pr0.5Nd0.5)0.12Fe1.93 alloy exhibits a high low-field magnetostriction λ a (~314 ppm/1 kOe), a large spontaneous magnetostriction coefficient λ 111 (~1710 ppm), a giant saturation magnetostriction λ S (~1060 ppm) and the low magnetocrystalline anisotropy at room temperature, and may make it a promising candidate for magnetostriction applications.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 50801039), the National Basic Research Program of China (No. 2012CB619404), Zhejiang Province (LY14E010001), Ningbo City (201601HJ-B01298) and the K.C. Wong Magna Fund of Ningbo University.
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Song, X.H., Liu, J.J., Wei, S.H. et al. Enhanced magnetoelastic effect in Laves (Tb,Dy)Fe2 alloys with the joint introduction of Pr and Nd. Appl. Phys. A 122, 564 (2016). https://doi.org/10.1007/s00339-016-0097-5
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DOI: https://doi.org/10.1007/s00339-016-0097-5