National Research Center "Kurchatov Institute", Kurchatov Sq. 1, Moscow 123182, Russia.
Nanoscale Horiz. 2023 May 30;8(6):803-811. doi: 10.1039/d3nh00009e.
2D magnets have recently emerged as a host for unconventional phases and related phenomena. The prominence of 2D magnetism stems from its high amenability to external stimuli and structural variations. The low dimensionality facilitates competition between magnetic orders which may give rise to exchange bias, in particular in magnetic heterostructures. Here, we propose a strategy for the search of exchange bias state in 2D individual compounds. We track the evolution of magnetic orders driven by the number of monolayers in a system exhibiting antiferromagnetism in the multilayer and ferromagnetism in the monolayer limit. The material, EuSi, has the structure of multilayer silicene intercalated by Eu. A strong intrinsic exchange bias effect accompanies the dimensional crossover. Comparison with silicene-based GdSi and germanene-based EuGe suggests the competition between magnetic orders to be a common property of this class of materials that may be useful in spintronic applications.
2D 磁体最近成为了非常规相和相关现象的宿主。2D 磁体的突出特点在于其对外界刺激和结构变化的高度适应性。低维性促进了磁序之间的竞争，这可能导致交换偏置，特别是在磁异质结构中。在这里，我们提出了一种在二维单个化合物中寻找交换偏置状态的策略。我们跟踪了在一个系统中，当层数增加时，磁序的演变，该系统在多层时表现为反铁磁，在单层时表现为铁磁。这种材料 EuSi 的结构是由 Eu 插层的多层硅烯组成。一个强烈的内在交换偏置效应伴随着维度的转变。与基于硅烯的 GdSi 和基于锗烯的 EuGe 的比较表明，磁序之间的竞争是这一类材料的共同特性，这可能在自旋电子学应用中很有用。
