Interaction of Trace Rare-Earth Dopants and Nanoheterogeneities Induces G iant Magnetostriction in Fe-Ga Alloys
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Interaction of Trace Rare-Earth Dopants and Nanoheterogeneities Induces G iant Magnetostriction in Fe-Ga Alloys
- 发表刊物：
- Advanced Functional Materials
- 摘要：
- The discovery of a tenfold increase in magnetostriction of Fe by alloying nonmagnetic Ga was a breakthrough in magnetostrictive materials. The large magnetostriction is attributed to tetragonal nanoheterogeneities dispersed in the bcc matrix. A further remarkable fivefold increase is achieved by trace rare earth doping (<1 at%) up to a value of ≈1500 ppm, more than 50 times that of pure iron. However, it remains a mystery why trace rare earth dopants can induce such giant magnetostriction. Here, it is found that interaction of rare earth dopants with the nanoheterogeneities produces the giant magnetostriction, through a combination of experimental studies, first‐principles calculation and phase field simulations. The dopants tend to enter the nanoheterogeneities, increasing their distortion thereby creating a larger tetragonal distortion of the matrix as well as increased magnetocrystalline anisotropy. A mesoscopic …
- 合写作者：
- Yangkun He; Xiaoqin Ke; Chengbao Jiang; Naihua Miao; Hui Wang; John Michael David Coey; Y unzhi Wang; Huibin Xu
- 卷号：
- 28
- 页面范围：
- 20
- 是否译文：
- 否
- 发表时间：
- 2018-05-01