Improved magneostriction and mechanical properties in dual-phase FeGa single crystal

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Abstract

Single-phase Fe81Ga19 and dual-phase (Fe0.81Ga0.19)99.95Tb0.05 single crystals with perfect [001] orientation were prepared by directional solidification technology. The performance of the dual-phase single crystal (SC) can achieve 399 ppm in magnetostriction and 10.2% in tensile fracture strain, which are, respectively, 28% and 5 times larger than those in single-phase Fe81Ga19 SC. The slight solid solution of Tb and dispersive distributed Tb-rich particles in dual-phase SC, respectively, lead to the improvement in magnetostriction and ductility. This dual-phase SC can become the candidate for new-generation magnetostrictive materials combining significant advantages in both structural and functional properties. Impact statement This dual-phase (Fe0.81Ga0.19)99.95Tb0.05 single crystal combining large magnetostriction and excellent mechanical properties can be new-generation magnetostrictive materials which can satisfy the application requirement in structural and functional properties.

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Wu, Y., Fang, L., Meng, C., Chen, Y., Wang, J., Liu, J., … Jiang, C. (2018). Improved magneostriction and mechanical properties in dual-phase FeGa single crystal. Materials Research Letters, 6(6), 327–332. https://doi.org/10.1080/21663831.2018.1451403

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