揭示范德华铁磁Fe3GeTe2纳米薄片器件中竞争相互作用与阻挫的影响
Unraveling effects of competing interactions and frustration in vdW ferromagnetic Fe3GeTe2 nanoflake devices
AI总结：
本文通过磁输运测量和原子级计算，揭示了少层Fe3GeTe2基范德华铁磁纳米器件中竞争相互作用与磁阻挫在热涨落辅助下产生非零标量自旋手性，从而导致非常规霍尔效应的机制。
摘要：
二维范德华磁体及器件因能在原子极限下稳定长程磁有序，并有望实现具有独特功能的新型量子器件而受到广泛关注。为实现这一目标，阐明磁输运性质并理解维度降低时相关相互作用的变化极为重要。本文研究了少数原子层Fe3GeTe2和(Co0.25Fe0.75)3GeTe2纳米薄片器件的磁输运性质。沿易轴施加磁场的磁输运测量表现出反常霍尔效应，而沿难轴施加磁场时则显示出异常行为。考虑反铁磁、铁磁和局域对称破缺相互作用存在的原子级计算揭示了热涨落辅助下磁阻挫效应的关键作用，导致非零标量自旋手性，从而表现为非常规霍尔效应。本结果阐明了少层二维范德华铁磁材料体系中的底层相互作用，对于理解面向二维自旋电子器件的范德华磁体中的非共线自旋构型具有重要意义。
英文摘要：
Two-dimensional (2D) van der Waals (vdW) magnets and devices have garnered significant attention owing to the stabilization of long range magnetic order down to atomic limit, and the prospect for novel quantum devices with unique functionalities. To achieve this objective, clarification of magnetotransport properties and understanding of the relevant interactions with lowering of dimensions are of extreme importance. Here, the magnetotransport properties of few atomic layer Fe3GeTe2 and (Co0.25Fe0.75)3GeTe2 nanoflake devices have been investigated. Magnetotransport investigations with applied magnetic field along the easy-axis shows anomalous Hall effect, while that for applied magnetic field along the hard-axis reveals an unusual behaviour. Atomistic calculations considering the presence of antiferromagnetic, ferromagnetic and local symmetry-breaking interactions reveal critical role of magnetic frustration effect assisted by thermal fluctuations, leading to a non-zero scalar spin chirality manifesting in an unconventional Hall effect. The present result clarifies the underlying interactions in few-layer 2D vdW ferromagnetic material system, important for the understanding of non-collinear spin configurations in vdW magnets for 2D spintronic devices.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
