Abstract
Structural, magnetic and magnetostrictive properties of Tb0.4Nd0.6(Fe0.8Co0.2) x (1.50 ≤ x ≤ 1.90) alloys have been investigated by means of X-ray diffraction (XRD), a vibrating sample magnetometer and a standard strain technique. XRD analysis shows the presence of single Laves phase with a cubic MgCu2-type structure for the high Nd content alloy around the composition of x = 1.80, which tends to be formed by curing at relatively low annealing temperature. The easy direction of magnetization at room temperature is observed toward <111> axis, accompanied by a rhombohedral distortion with a large spontaneous magnetostriction λ111. An optimized effect on the linear anisotropic magnetostriction, 360 ppm at 3 kOe, was observed for the high Nd content Tb0.4Nd0.6(Fe0.8Co0.2)1.80 alloy, which can be attributed to its single Laves phase, the large λ111 (~1,520 ppm) of the MgCu2-type (Tb,Nd)(Fe,Co)2 phase and the good soft magnetic behaviors.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Nos.50801039 and 11074227), Zhejiang (Y14E010004), Ningbo (2012A610054), and K.C. Wong Magna Fund in Ningbo University. The authors gratefully acknowledge the help of Professor Zhidong Zhang, Dr. Weijun Ren and Dr. Yong Wang (Institute of Metal Research, Chinese Academy of Sciences) in the measurement of partial samples.
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Pan, Z.B., Liu, J.J., Wang, R. et al. Structure and magnetostriction of Tb0.4Nd0.6(Fe0.8Co0.2) x alloys. Appl. Phys. A 115, 1121–1125 (2014). https://doi.org/10.1007/s00339-014-8329-z
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DOI: https://doi.org/10.1007/s00339-014-8329-z