Enhanced magnetoelastic effect in Laves (Tb,Dy)Fe sub(2) alloys with the joint introduction of Pr and Nd

• Published in: Applied physics. A, Materials science & processing Vol. 122; no. 6; pp. 1 - 6
• Main Authors: Song, X H, Liu, J J, Wei, SH, Zhu, X Y, Li, F, Zhang, Z R, Si, P Z, Ren, W J
• Format: Journal Article
• Language: English
• Published: 01.06.2016
• Subjects: Anisotropy; Magnetic properties; Magnetization; Magnetostriction; Neodymium; Saturation; Strain gauges; X-ray diffraction
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-016-0097-5

The structural and magnetoelastic properties of (Tb sub(0.3)Dy sub(0.7)) sub(1-x)(Pr sub(0.5)Nd sub(0.5)) sub(x)Fe sub(1.93) (0 less than or equal to x less than or equal to 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)Fe sub(2) Laves phase with a cubic MgCu sub(2)-type structure is formed when x less than or equal to 0.12, while a small amount of impurities appear when x greater than or equal to 0.15. The easy magnetization direction at room temperature is detected toward axis. The analysis of XRD, magnetization and magnetostriction shows that the Pr and Nd elements joint introduction into (Tb,Dy)Fe sub(2) system can reduce the magnetocrystalline anisotropy and improve the magnetoelastic properties. The (Tb sub(0.3)Dy sub(0.7)) sub(0.88)(Pr sub(0.5)N d sub(0.5)) sub(0.12)Fe sub(1.93) alloy exhibits a high low-field magnetostriction lambda sub(a) (~314 ppm/1 kOe), a large spontaneous magnetostriction coefficient lambda sub(111) (~1710 ppm), a giant saturation magnetostriction lambda sub(S) (~1060 ppm) and the low magnetocrystalline anisotropy at room temperature, and may make it a promising candidate for magnetostriction applications.