Antiferromagnets (AFMs) with chiral noncollinear spin structure have attracted great attention in recent years. However, the existing research has mainly focused on hexagonal chiral AFMs, such as Mn₃Sn, Mn₃Ga, Mn₃Ge with low crystalline symmetry. Here, we present our systematical study for the face-centered cubic noncollinear antiferromagnetic Mn₃Pt. By varying the alloy composition (x), we have successfully fabricated antiferromagnetic Mn_1−xPt_x epitaxial films on MgO substrates and have observed a crystalline structure transition from L1₀ MnPt to L1₂ Mn₃Pt. The Mn₃Pt exhibits a large anomalous Hall effect, which is in the same order of magnitude as those of ferromagnetic materials. Moreover, a large thickness-evolved strain effect is revealed in Mn₃Pt films by X-ray diffraction (XRD) analysis based on the Scherrer method. Our work explores Mn₃Pt as a promising candidate for topological antiferromagnetic spintronics.

中文翻译：

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立方非共线反铁磁Mn 3 Pt外延膜的拓扑异常霍尔效应的结构和应变调谐。

近年来，具有手性非共线自旋结构的反铁磁体（AFM）引起了极大的关注。然而，现有的研究主要集中在六方手性原子力显微镜上，例如具有低晶体对称性的Mn ₃ Sn，Mn ₃ Ga，Mn ₃ Ge。在这里，我们对面心立方非共线反铁磁Mn ₃ Pt进行系统研究。通过改变合金成分（x），我们已经成功地在MgO衬底上制备了反铁磁Mn _{1- x} Pt _x外延膜，并观察到晶体结构从L 1 ₀ MnPt转变为L 1 ₂ Mn ₃铂 Mn ₃ Pt表现出大的异常霍尔效应，与铁磁材料的霍尔效应数量级相同。此外，通过基于Scherrer方法的X射线衍射（XRD）分析，在Mn ₃ Pt膜中显示出大的厚度演变应变效应。我们的工作探索Mn ₃ Pt作为拓扑反铁磁自旋电子学的有前途的候选者。