Enhanced magnetization in proton irradiated Mn3Si2Te6 van der Waals crystals
Enhanced magnetization in proton irradiated Mn3Si2Te6 van der Waals crystals
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DOI：
10.1063/5.0002168
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发表时间：
2020-04
影响因子：
4
通讯作者：
L. Martinez;H. Iturriaga;R. Olmos;L. Shao;Y. Liu;T. Mai;C. Petrovic;A. H. Hight Walker;S. Singamaneni
中科院分区：
文献类型：
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作者：
L. Martinez;H. Iturriaga;R. Olmos;L. Shao;Y. Liu;T. Mai;C. Petrovic;A. H. Hight Walker;S. Singamaneni
范德瓦尔斯（vdW）磁性工程是目前业界日益关注的一个课题。我们研究了准二维层状 vdW Mn3Si2Te6 (MST) 晶体在质子辐照下的磁性与 1 × 1015、5 × 1015、1 × 1016 和 1 × 1018 H+/cm2 注量的函数关系。我们发现，当 MST 晶体受到 5 × 1015 的质子注量照射时，亚铁磁相（50 K）的磁化强度在 ab 和 c 平面上分别显着增强了 53 % 和 37 %。即使在质子照射后，亚铁磁有序温度和磁各向异性仍然保留。 From the fluence dependence of magnetization, electron paramagnetic resonance spectral parameters (g-value and signal width), and Raman data, we show that the magnetic exchange interactions (Mn–Te–Mn) are significantly modified at this fluence.这项工作表明，可以利用质子辐照来调节 vdW 晶体的磁性能，并为设计所需的磁相提供许多机会。
van der Waals (vdW) engineering of magnetism is a topic of increasing research interest in the community at present. We study the magnetic properties of quasi-two-dimensional layered vdW Mn3Si2Te6 (MST) crystals upon proton irradiation as a function of fluences of 1 × 1015, 5 × 1015, 1 × 1016, and 1 × 1018 H+/cm2. We find that the magnetization is significantly enhanced by 53 % and 37 % in the ferrimagnetic phase (at 50 K) when the MST crystal was irradiated with the proton fluence of 5 × 1015, both in ab and c planes, respectively. The ferrimagnetic ordering temperature and magnetic anisotropy are retained even after proton irradiation. From the fluence dependence of magnetization, electron paramagnetic resonance spectral parameters (g-value and signal width), and Raman data, we show that the magnetic exchange interactions (Mn–Te–Mn) are significantly modified at this fluence. This work shows that it is possible to employ proton irradiation in tuning the magnetic properties of vdW crystals and provide many opportunities to design desired magnetic phases.