东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (10): 59-65.DOI: 10.12068/j.issn.1005-3026.2025.20240052

• 材料与冶金 • 上一篇    下一篇

掺杂Bi/Pb/Au/Cu促进L10-FeNi有序转变的第一性原理

王群首1,2, 唐家雨1,2, 姚爽1,2, 裴文利1,2   

  1. 1.东北大学 材料科学与工程学院,辽宁 沈阳 110819
    2.东北大学 材料各向异性与织构教育部重点实验室,辽宁 沈阳 110819
  • 收稿日期:2024-03-05 出版日期:2025-10-15 发布日期:2026-01-13
  • 作者简介:王群首(1999—),男,河北邢台人,东北大学博士研究生
    裴文利(1970—),男,辽宁沈阳人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52371179)

Ordering Transition of L10-FeNi Promoted by Doping Bi/Pb/Au/Cu with First Principles

Qun-shou WANG1,2, Jia-yu TANG1,2, shuang YAO1,2, Wen-li PEI1,2   

  1. 1.School of Materials Science & Engineering,Northeastern University,Shenyang 110819,China
    2.Key Laboratory for Anisotropy & Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China. Corresponding author: PEI Wen-li,E-mail: peiwl@atm. neu. edu. cn
  • Received:2024-03-05 Online:2025-10-15 Published:2026-01-13

摘要:

L10有序结构的FeNi材料具有优异的磁性能,拥有广阔的应用前景.但FeNi中的L10结构形成温度低,在此温度下原子有序化扩散缓慢,导致实验中难以直接合成L10-FeNi.本文针对该问题,利用第一性原理研究了掺杂Bi,Pb,Au和Cu元素对FeNi的有序化扩散和磁性能的影响.结果表明:掺杂第三元素可以有效改善FeNi的形成动力学,从而促进FeNi的有序转变.其中Au与Cu元素更易替位掺杂,更有利于结构的稳定性,Bi,Pb,Au和Cu更容易占据Fe位.元素的掺杂可有效降低FeNi的空位形成能,从而降低了扩散激活能,促进了Fe原子和Ni原子的扩散和转移,进而降低FeNi的无序-有序转变势垒,有效促进FeNi的有序转变.掺杂第三元素在Ni位点时对FeNi的电子结构和磁性能影响很小.

关键词: L10-FeNi, 有序转变, 磁性能, 扩散激活能

Abstract:

The FeNi material with L10 ordered structure has excellent magnetic properties and broad application prospects. However, the formation temperature of the L10 structure in FeNi is low, and the atomic ordering diffusion is slow at this temperature. Therefore, it is difficult to directly synthesize L10-FeNi in the experiment. The effects of doping with Bi, Pb, Au, and Cu elements on the ordering diffusion and magnetic properties of FeNi were investigated by using the first principles. The results show that doping with a third element can effectively improve the formation kinetics of FeNi, thereby promoting the ordering transition of FeNi. Among them, Au and Cu elements are easier to substitute for the matrix atoms and are doped into the lattice, which is more conducive to the stability of the structure. Bi, Pb, Au, and Cu are more likely to occupy the Fe site. The doping of elements can effectively reduce the vacancy formation energy of FeNi, which reduces the diffusion activation energy and promotes the diffusion and transfer of Fe and Ni atoms. Therefore, the disorder-order transition barrier of FeNi can be lowered to effectively improve the ordering transition of FeNi. The doping of third elements at the Ni site has little effect on the electronic structure and magnetic properties of FeNi.

Key words: L10-FeNi, ordering transition, magnetic property, diffusion activation energy

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