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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (11): 1954-1960.DOI: 10.16553/j.cnki.issn1000-985x.2025.0123

• 研究论文 • 上一篇    下一篇

Fe/Co掺杂诱导单层NiBr2金属性转变及增强的磁各向异性

王睿1(), 辛延波1, 杨国晖2()   

  1. 1.山西工程技术学院,阳泉 045000
    2.山西师范大学物理与信息工程学院,太原 030031
  • 收稿日期:2025-06-06 出版日期:2025-11-20 发布日期:2025-12-11
  • 通信作者: 杨国晖,博士,教授。E-mail:19834108250@163.com
  • 作者简介:王睿(1995—),女,山西省人,硕士,助教。E-mail:18635780363@163.com
  • 基金资助:
    山西省优秀博士来晋工作科研启动项目(601499)

Fe/Co Doping-Induced Metallic Transition and Enhanced Magnetic Anisotropy in Monolayer NiBr2

WANG Rui1(), XIN Yanbo1, YANG Guohui2()   

  1. 1. Shanxi Institute of Technology,Department of Fundamental Courses,Yangquan 045000 China
    2. School of Physics and Information,Shanxi Normal University,Taiyuan 030031 China
  • Received:2025-06-06 Online:2025-11-20 Published:2025-12-11

摘要: 二维磁性材料的性能调控对发展纳米自旋电子器件至关重要。为了理解Fe/Co掺杂对单层NiBr2电磁性能的调控机理,本文通过第一性原理系统研究了Fe/Co掺杂对单层NiBr2电磁性能的影响。就结构稳定性而言,随着Br原子化学势的变化,Fe原子掺杂比本征结构更稳定。同时,当Br的化学势处于特定范围(-1.12 eV<μBr<-0.50 eV)时更容易得到完美的单层NiBr2。就电子结构而言,Fe掺杂的引入使NiBr2发生从半导体到金属的转变(FeNi)。就磁性质而言,Fe/Co的掺杂显著增强了NiBr2的面外磁各向异性。同样Fe掺杂也使结构的相变温度提升至63.7 K,为单层NiBr2的2.5倍。本研究揭示了过渡金属掺杂对NiBr2电磁性能的调控规律,为纳米级自旋电子器件的快速发展提供理论支持。

关键词: NiBr2; 二维磁性材料; 原子掺杂; 相变温度; 电磁性能; 磁各向异性

Abstract: Performance regulation of two-dimensional magnetic materials is crucial for the development of nanoscale spintronic devices. To explore the modulation mechanisms of Fe/Co doping on the electromagnetic properties of monolayer NiBr2, the influence of Fe/Co doping on the electromagnetic properties of monolayer NiBr2 was systematically investigated by first-principles calculations. In terms of structural stability, Fe doping is more stable than monolayer NiBr2 with the change of the chemical potential of Br. Meanwhile, Fe doping is easier to obtain monolayer NiBr2, when the chemical potential of Br is within a specific range (-1.12 eV<μBr<-0.50 eV). For electronic structures, Fe doping leads to semiconductor-to-metal transformation. In terms of magnetic properties, Fe/Co doping significantly enhances the out-of-plane magnetic anisotropy in NiBr2. Similarly, Fe doping enhances the phase transition temperature to 63.7 K, which is 2.5 times of monolayer NiBr2. This investigation reveals the regulation law of transition metal doping on the electromagnetic properties of monolayer NiBr2, and provides theoretical support for the rapid development of nanoscale spintronic devices.

Key words: NiBr2; two-dimensional magnetic material; atomic doping; phase transition temperature; electromagnetic property; magnetic anisotropy

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