Abstract In this paper, the magnetic properties, thermal spin fluctuation and the spin wave spectra of a 2D tetragonal ferromagnetic monolayer with Heisenberg model including single-ion anisotropy are studied using functional integral method. Influence of exchange interaction at edge on these properties of the monolayer is also considered. The model is applied for a new robust ferromagnetic monolayer with the 2D tetragonal structure, Co2S2, in which the exchange interaction between magnetic atoms and non-magnetic atoms is included due to hybridization between Co 3d states and S 3p states.

中文翻译：

---

具有二维四方结构的铁磁单层的磁性和自旋波谱：Co2S2 单层的应用

摘要 本文采用泛函积分法研究了具有单离子各向异性的海森堡模型的二维四方铁磁单层的磁性、热自旋涨落和自旋波谱。还考虑了边缘交换相互作用对单层这些性质的影响。该模型适用于具有二维四方结构 Co2S2 的新型坚固铁磁单层，其中由于 Co 3d 态和 S 3p 态之间的杂化，包括磁性原子和非磁性原子之间的交换相互作用。