Tailoring MBE growth of c-Mn3Sn directly on MgO (111) from islands to film

IF 5.4 1区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Quantum Materials Pub Date : 2025-04-24 DOI:10.1038/s41535-025-00760-9

Longfei He, Ursula Ludacka, Payel Chatterjee, Matthias Hartl, Dennis Meier, Christoph Brüne

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Abstract

We present our study of (0001) oriented Mn₃Sn (c-Mn₃Sn) thin films synthesized directly on an MgO (111) substrate via molecular beam epitaxy. We identify a growth window where Mn₃Sn growth can be controlled through slight adjustments of the Mn flux, achieving either μm²-sized high crystalline-quality islands or an almost completely continuous film. High-resolution X-ray diffraction results indicate that both films are highly (0001) oriented. The atomic resolution images show clear film-substrate interfaces displaying an epitaxial relationship. Scanning precession electron diffraction measurements reveal that the island featured sample has highly crystallized Mn₃Sn. The sample featuring a high continuity exhibits defects in some areas but retains the dominant Mn₃Sn structure. This work demonstrates a potential method for synthesizing high crystalline-quality Mn₃Sn films with substantial coverage, facilitating the study of Mn₃Sn films without the influence of an additional buffer layer and promoting their application in integrated spintronics.

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c-Mn3Sn直接在MgO（111）上从岛到膜的MBE生长

我们研究了通过分子束外延直接在MgO（111）衬底上合成（0001）取向的Mn3Sn （c-Mn3Sn）薄膜。我们确定了一个生长窗口，通过稍微调整Mn通量可以控制Mn3Sn的生长，从而实现μm²大小的高结晶质量岛或几乎完全连续的薄膜。高分辨率x射线衍射结果表明，两种薄膜都是高度（0001）取向的。原子分辨率图像显示出清晰的薄膜-衬底界面，显示出外延关系。扫描进动电子衍射测量表明，岛状样品具有高度结晶化的Mn3Sn。具有高连续性的样品在某些区域存在缺陷，但保留了主要的Mn3Sn结构。这项工作展示了一种潜在的方法来合成高晶体质量的Mn3Sn薄膜，具有很大的覆盖率，促进了Mn3Sn薄膜的研究，而不需要额外的缓冲层的影响，并促进了其在集成自旋电子学中的应用。

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来源期刊

npj Quantum Materials Materials Science-Electronic, Optical and Magnetic Materials

CiteScore

10.60

自引率

3.50%

发文量

107

审稿时长

6 weeks

期刊介绍： npj Quantum Materials is an open access journal that publishes works that significantly advance the understanding of quantum materials, including their fundamental properties, fabrication and applications.