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Tuning of 2D magnets Curie temperature via substrate
Journal of Magnetism and Magnetic Materials ( IF 2.7 ) Pub Date : 2021-09-16 , DOI: 10.1016/j.jmmm.2021.168553
Sergey V. Belim 1 , Igor V. Bychkov 2, 3 , Ivan Maltsev 2 , Dmitry A. Kuzmin 2, 3 , Vladimir G. Shavrov 4
Affiliation  

We have investigated the substrate influence on the Curie temperature of 2D magnet using the simple Ising model on a square lattice and the Frenkel–Kontorova potential for the substrate. We have found that the change in the phase transition temperature is directly proportional to the gradient of the exchange integral and the period of the substrate. The incommensurate arrangement of atoms with respect to the substrate potential leads to complex effects, such as the influence of the substrate potential and the coverage coefficient on the phase transition in the spin system. Moreover, the phase transition temperature can be increased or decreased, either the coverage coefficient is θ<1 or θ>1. Our results will help to understand deeply the effect of substrate on magnetic properties of 2D magnets.



中文翻译:

通过基板调整 2D 磁体居里温度

我们已经使用方形晶格上的简单 Ising 模型和基板的 Frenkel-Kontorova 势研究了基板对 2D 磁体居里温度的影响。我们发现相变温度的变化与交换积分的梯度和衬底的周期成正比。原子相对于衬底电位的不公度排列会导致复杂的效应,例如衬底电位和覆盖系数对自旋系统中相变的影响。此外,相变温度可以升高或降低,覆盖系数为θ<1 或者 θ>1. 我们的结果将有助于深入了解基材对二维磁体磁性能的影响。

更新日期:2021-09-21
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