Abstract
In order to demonstrate that light rare-earth (RE) dopants with strong magnetocrystalline anisotropy, whose net moment couples are antiparallel to those of iron, can also induce giant magnetostriction in Gafenol, a light RE element Sm was selected as the third element to dope into Fe83Ga17 alloy. (Fe0.83Ga0.17)100−x Sm x (0 ≤ x ≤ 0.42) ribbons were prepared by melt spinning. The increase of the lattice parameters and saturation magnetization indicates that some Sm atoms enter the A2 matrix substitutionally. Doping the Fe83Ga17 ribbons with the light RE Sm element drastically improves the magnetostriction. Perpendicular magnetostriction value of λ ⊥ = −5 × 10−4 is achieved in (Fe0.83Ga0.17)99.75Sm0.25. It is confirmed that the stronger local magnetocrystalline anisotropy induces larger enhanced magnetostrictions. The greatly enhanced magnetostriction is somehow related to the local microstrains induced by the RE dopants. It is likely that the RE-induced defects in the (Fe0.83Ga0.17)100−x RE x ribbons function in the similar way as the Ga–Ga pair defects in the undoped Fe–Ga alloys.
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Acknowledgments
This study was financially supported by the National Basic Research Program (No. 2012CB619404), the National High-Tech R&D Program (No. 2013AA030903), and the National Natural Science Foundation of China (Nos. 51331001 and 51221163).
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Wu, W., Jiang, C. Improved magnetostriction of Fe83Ga17 ribbons doped with Sm. Rare Met. 36, 18–22 (2017). https://doi.org/10.1007/s12598-016-0758-8
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DOI: https://doi.org/10.1007/s12598-016-0758-8