Spatial decomposition of magnetic anisotropy in magnets: Application to doped Fe16N2
Spatial decomposition of magnetic anisotropy in magnets: Application to doped Fe16N2
复制标题
磁体磁各向异性的空间分解：在掺杂 Fe16N2 中的应用
DOI：
10.1103/physrevb.102.134429
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发表时间：
2020
影响因子：
3.7
通讯作者：
Antropov, Vladimir
中科院分区：
文献类型：
--
作者：
Sun, Yang;Yao, Yong-Xin;Nguyen, Manh Cuong;Wang, Cai-Zhuang;Ho, Kai-Ming;Antropov, Vladimir
我们提出了固体中总相对论能量分解为原子内和原子间贡献的方案。这种方法是以光速等基本常数的位置变化为基础的。作为该方法的一个实际例子，我们在CoPt中磁各向异性能（MAE）分解的自旋轨道相互作用变化的情况下测试了这种分解。我们进一步研究了Bi、Sb、Co和Pt原子掺杂的α″-Fe16N2磁体。结果表明，Pt原子的加入可使总MAE提高5倍，而Bi和Sb原子的加入可使总MAE提高2倍。利用提出的技术，我们展示了这些增强的空间分布。我们的研究还表明Sb、Pt和Co的取代可以通过实验合成。
We propose a scheme of decomposition of the total relativistic energy in solids to intra- and interatomic contributions. The method is based on a site variation of such fundamental constant as the speed of light. As a practical illustration of the method, we tested such decomposition in the case of a spin-orbit interaction variation for the decomposition of the magnetic anisotropy energy (MAE) in CoPt. We further studied the α″-Fe16N2 magnet doped by Bi, Sb, Co, and Pt atoms. It was found that the addition of Pt atoms can enhance the MAE by as much as five times while Bi and Sb substitutions double the total MAE. Using the proposed technique, we demonstrate the spatial distribution of these enhancements. Our studies also suggest that Sb, Pt, and Co substitutions could be synthesized by experiments.