Structure and strain tunings of topological anomalous Hall effect in cubic noncollinear antiferromagnet Mn3Pt epitaxial films
Structure and strain tunings of topological anomalous Hall effect in cubic noncollinear antiferromagnet Mn3Pt epitaxial films
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立方非共线反铁磁体Mn3Pt外延薄膜中拓扑反常霍尔效应的结构和应变调谐
DOI：
10.1007/s11433-019-1525-6
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
XuePeng Qiu
中科院分区：
文献类型：
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作者：
Ning An;Meng Tang;HuangLin Yang;Shuai Hu;WeiJia Fan;ShiMing Zhou;XuePeng Qiu
近年来，具有手性非共线自旋结构的反铁磁体引起了人们的极大关注。然而，现有的研究主要集中在六方结构的手性原子力显微镜上，如晶体对称性较低的Mn3SnMn3GaMn3Ge。在这里，我们系统地研究了面心立方非共线反铁磁性材料Mn3Pt。通过改变合金成分(X)，我们在−衬底上成功地制备了反铁磁性Mn1-xPtx外延薄膜，观察到了L10MnPT到L12Mn3PT的晶体结构转变。该材料表现出与铁磁材料相同数量级的大反常霍尔效应。此外，基于Scherrer方法的X射线衍射仪分析表明，Mn3Pt薄膜存在较大的厚度演化应变效应。我们的工作探索了作为拓扑反铁磁自旋电子学的一个有前途的候选者。
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 Mn1−xPtxepitaxial films on MgO substrates and have observed a crystalline structure transition fromL10MnPt toL12Mn3Pt. 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.