电场诱导的磁相过渡在 (Hf2/3Fe1/3) 2COF中
Mingyu Zhao1,2, Yanan Tang1
1Quantum Materials Research Center, College of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, People's Republic of China. yntang2010@163.com.
Physical chemistry chemical physics : PCCP
|November 3, 2025
概括
研究人员发现了一种新的二维Janus磁MXene, (Hf2/3Fe1/3) 2COF,表现出内在的磁电合. 应用电场可以切换其磁矩,从而为新型电子设备提供了潜力.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 铁磁和铁电破坏了不同的对称性 (分别是时间逆转和空间逆转).
- 内在的磁电合是罕见的,因为磁性和电的来源不同.
- 二维 (2D) 材料为先进的应用提供了独特的特性.
研究的目的:
- 为了预测和研究新的2DJanus在平面上有序的磁MXene结构中的内在磁电合.
- 探索外部刺激的影响,如电场和应变对材料的磁性.
- 为设计具有磁电合的二维材料提出一个新的策略.
主要方法:
- 密度函数理论 (DFT) 计算以确定电子和磁性结构.
- 蒙特卡洛模拟用于分析磁相变和尼尔温度.
- 通过电场操纵和应变效应对磁电合的研究.
主要成果:
- 预测了一个新的二维Janus材料, (Hf2/3Fe1/3) 2COF,具有内在的磁电合.
- 确定了基本状态为铁磁性,Neel温度为12K.
- 证明了磁矩方向的电场控制 (0.4 eV Å-1),可通过双轴压缩应变 (-0.1 eV Å-1) 调节.
结论:
- 修改表面功能组是一种有效的策略,可以在2D平面内磁性结构中实现磁电合.
- 预测的 (Hf2/3Fe1/3) 2COF是需要合磁和电反应的应用的有希望的候选者.
- 这项工作为设计下一代二维磁电材料提供了新的途径.
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