Article Enhancing magnetostriction in FeAl alloys via crystal growth orientation tuning by a trace amount of Pt doping

Zhiyong Dai ; Ruisheng Zhang ; Chao Zhou ; Yuanliang Chen ; Sen Kong ; Yin Zhang ; Fanghua Tian ; Wenliang Zuo ; Yoshitaka Matsushita SAMURAI ORCID (National Institute for Materials Science) ; Sen Yang ; Kaiyun Chen ; Xiaoping Song

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Zhiyong Dai, Ruisheng Zhang, Chao Zhou, Yuanliang Chen, Sen Kong, Yin Zhang, Fanghua Tian, Wenliang Zuo, Yoshitaka Matsushita, Sen Yang, Kaiyun Chen, Xiaoping Song. Enhancing magnetostriction in FeAl alloys via crystal growth orientation tuning by a trace amount of Pt doping. Journal of Materials Research and Technology. 2024, 33 (), 3376-3383. https://doi.org/10.1016/j.jmrt.2024.10.038

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(abstract)

Iron-based cubic alloy systems opened the door to the development of magnetostrictive materials with moderate magnetostriction, low cost, and good mechanical properties. At the as-cast state, the grain growth orientation of these alloy systems is close to random, which deteriorates magnetostriction. Doping with certain elements can tune the growth orientation to enhance magnetostriction. However, the driving force for the crystal growth along preferential orientation is still not clear. Here in this work, revealed by density functional theory (DFT) calculation, Pt doping can tune the crystal growth direction of FeAl along <100> crystal direction (same as easy magnetization direction), which can be utilized to realize 90° domain-switching and thus magnetostriction is enhanced greatly. These are confirmed by experimental results. The magnetostriction increases from 29 ppm to 80 ppm, representing a 176% enhancement through doping with 0.4 at.% Pt. The maze magnetic domain structures, observed by magnetic force microscope, are also preferentially <100> oriented and feature stripes. In consideration of the similarity between this study and our previous study on FeGa alloy (C. Zhou et al., 2020), it can be expected that our methods can be extended to other magnetostrictive materials and help develop polycrystals with desired orientations.

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Keyword: FeAl alloy, doping, magnetostriction, crystal growth orientation, magnetocrystalline anisotropy

Date published: 2024-10-05

Publisher: Elsevier BV

Journal:

  • Journal of Materials Research and Technology (ISSN: 22387854) vol. 33 p. 3376-3383

Funding:

  • Key Science and Technology Program of Shaanxi Province
  • Natural Science Basic Research Program of Shaanxi Province
  • NSFC

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5466

First published URL: https://doi.org/10.1016/j.jmrt.2024.10.038

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Updated at: 2025-05-09 08:30:09 +0900

Published on MDR: 2025-05-09 08:19:23 +0900

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