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Enhanced Ferromagnetism and Tunable Magnetism in Fe3GeTe2 Monolayer by Strain Engineering.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-15 , DOI: 10.1021/acsami.0c05530 Xiaohui Hu 1, 2 , Yinghe Zhao 3 , Xiaodong Shen 1, 2 , Arkady V Krasheninnikov 4, 5 , Zhongfang Chen 3 , Litao Sun 6
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-15 , DOI: 10.1021/acsami.0c05530 Xiaohui Hu 1, 2 , Yinghe Zhao 3 , Xiaodong Shen 1, 2 , Arkady V Krasheninnikov 4, 5 , Zhongfang Chen 3 , Litao Sun 6
Affiliation
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Recent discovery of intrinsic ferromagnetism in Fe3GeTe2 (FGT) monolayer [Deng, Y. ; Nature 2018, 563, 94−99; Fei, Z. ; Nat. Mater. 2018, 17, 778–782] not only extended the family of two-dimensional (2D) magnetic materials but also stimulated further interest in the possibility to tune their magnetic properties without changing the chemical composition or introducing defects. By means of density functional theory computations, we explore strain effects on the magnetic properties of the FGT monolayer. We demonstrate that the ferromagnetism can be largely enhanced by the tensile strain in the FGT monolayer due to the competitive effects of direct exchange and superexchange interaction. The average magnetic moments of Fe atoms increase monotonically with an increase in biaxial strain from −5 to 5% in FGT monolayer. The intriguing variation of magnetic moments with strain in the FGT monolayer is related to the charge transfer induced by the changes in the bond lengths. Given the successful fabrication of the FGT monolayer, the strain-tunable ferromagnetism in the FGT monolayer can stimulate the experimental effort in this field. This work also suggests an effective route to control the magnetic properties of the FGT monolayer. The pronounced magnetic response toward the biaxial strain can be used to design the magnetomechanical coupling spintronics devices based on FGT.
中文翻译：
通过应变工程增强Fe3GeTe2单层中的铁磁性和可调谐磁性。
Fe 3 GeTe 2（FGT）单层内在铁磁性的最新发现[邓Y ; 自然 2018，563，94-99;费Z. ; 纳特 母校 2018，17（778–782），不仅扩展了二维（2D）磁性材料的种类，而且激发了人们对在不改变化学成分或引入缺陷的情况下调整其磁性质的兴趣。通过密度泛函理论计算，我们探索了应变对FGT单层磁性的影响。我们证明，由于直接交换和超交换相互作用的竞争作用，FGT单层中的拉伸应变可以大大增强铁磁性。Fe原子的平均磁矩随FGT单层中双轴应变从-5的增加单调增加，从-5增加到5％。在FGT单层中，磁矩的有趣变化与应变有关，这与键长变化引起的电荷转移有关。如果成功制造了FGT单层，则FGT单层中的应变可调铁磁性可以刺激该领域的实验工作。这项工作还提出了控制FGT单层磁性的有效途径。对双轴应变的明显磁响应可用于设计基于FGT的磁机械耦合自旋电子器件。
更新日期：2020-05-15
中文翻译：
通过应变工程增强Fe3GeTe2单层中的铁磁性和可调谐磁性。
Fe 3 GeTe 2（FGT）单层内在铁磁性的最新发现[
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