Intrinsic ferromagnetism with high Curie temperature and strong anisotropy in a ferroelastic VX monolayer (X=P, As)
| Autor: | Minglang Hu, Xuli Cheng, Wei Wu, Wei Ren, Fanhao Jia, Guodong Zhao, Shaowen Xu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review B. 104 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.104.104417 |
| Popis: | Two-dimensional (2D) multiferroic materials, with combined large magnetic anisotropic energy (MAE) and high Curie temperature $({\mathbit{T}}_{C})$, have great potential in emerging electronic device applications, such as high-density multistate data storage and fast operation. However, various 2D spintronic materials fabricated in experiment, so far have small MAE and low ${\mathbit{T}}_{C}$. Using first-principles calculations, we proposed two $\mathrm{V}X$ $(X=\mathrm{P}, \mathrm{As})$ monolayers, which are identified to possess robust stability dynamically, thermally, and mechanically. $\mathrm{V}X$ monolayers are half-metals with coexisting ferroelastic and ferromagnetic properties. Moreover, their ground states exhibit significant in-plane MAEs of 101.48 and $262.68\phantom{\rule{0.16em}{0ex}}\ensuremath{\mu}\mathrm{eV}$ per V atom for VP and VAs monolayers, respectively. Additionality, the Curie temperatures of VP and VAs monolayers predicted from Heisenberg model are as high as 545 and 890 K, respectively, and the ferromagnetism could survive at room temperature. Our results are beneficial for further research on 2D multiferroics and provide the possibility for future nanodevices. |
| Databáze: | OpenAIRE |
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