Variable spin texture in Mn3Sn/Pt heterostructures revealed by magnetic circular dichroism
Variable spin texture in Mn3Sn/Pt heterostructures revealed by magnetic circular dichroism
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DOI：
10.1063/5.0163593
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发表时间：
2023-08
影响因子：
4
通讯作者：
Nai Jiang;Yongcheng Deng;Xionghua Liu;Dong Zhang;Enze Zhang;Hou-zhi Zheng;K. Chang;Chao Shen;Kaiyou Wang
中科院分区：
文献类型：
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作者：
Nai Jiang;Yongcheng Deng;Xionghua Liu;Dong Zhang;Enze Zhang;Hou-zhi Zheng;K. Chang;Chao Shen;Kaiyou Wang
具有D 019六方结构的非共线反铁磁体在拓扑自旋电子学中具有潜在的应用价值，因而引起了人们的极大关注。探索自旋织构和电子能带结构之间的关系对于理解这些手征反铁磁体的物理性质至关重要。本文利用磁性圆二色性（MCD）光谱系统地研究了非共线反铁磁Mn 3Sn薄膜的拓扑自旋织构的变化。通过引入界面间的Dzyaloshinskiii-Moriya相互作用，在室温下实现了Mn 3Sn/Pt异质结中Mn自旋织构从共面倒三角结构到涡旋自旋织构的演化.相应地，非常规的零交叉点的能量分辨MCD光谱，以及一个零交叉点逐渐移动到较长的波长进行了观察。我们的工作提供了一种通过界面DMI调制自旋纹理的方法和一种有效的非接触磁光检测方法来揭示非共线反铁磁/重金属系统的自旋纹理。
Non-collinear antiferromagnets with a D019 hexagonal structure have attracted tremendous attention for their potential applications in topological spintronics. Exploring the relationship between spin texture and electronic band structure is crucial for understanding the physical nature of these chiral antiferromagnets. Here, we systematically investigated the variation of topological spin texture of the non-collinear antiferromagnet Mn3Sn film using magnetic circular dichroism (MCD) spectroscopy. The evolution of Mn spin texture from coplanar inverted triangular structure to swirling spin texture was achieved in Mn3Sn/Pt heterostructures through introducing an interfacial Dzyaloshinskii–Moriya interaction (DMI) at room temperature. Correspondingly, unconventional zero-crossing points in energy-resolved MCD spectra as well as a gradual shift of a zero-crossing point to longer wavelength were observed. Our work provides a spin texture modulation approach via interfacial DMI and an effective non-contact magneto-optical detection method to reveal the spin texture in the non-collinear antiferromagnet/heavy metal system.