${\mathrm{Fe}}_{3-x}{\mathrm{GeTe}}_2$ is a layered van der Waals magnetic material with a relatively high ordering temperature and large anisotropy. While most studies have concluded the interlayer ordering to be ferromagnetic, there have also been reports of interlayer antiferromagnetism in ${\mathrm{Fe}}_{3-x}{\mathrm{GeTe}}_2$. Here, we investigate the interlayer magnetic ordering by neutron diffraction experiments, scanning tunneling microscopy (STM) and spin-polarized STM measurements, density functional theory plus U calculations, and STM simulations. We conclude that the layers of ${\mathrm{Fe}}_{3-x}{\mathrm{GeTe}}_2$ are coupled ferromagnetically and that in order to capture the magnetic and electronic properties of ${\mathrm{Fe}}_{3-x}{\mathrm{GeTe}}_2$ within density functional theory, Hubbard U corrections need to be taken into account.

中文翻译：

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Fe3-xGeTe2中的层间磁性

${铁}_{3-X}{\mathrm{吉特}}_2$是具有较高序温度和较大各向异性的层状范德华磁性材料。尽管大多数研究已得出层间有序为铁磁的结论，但也有报道称层间反铁磁性${铁}_{3-X}{\mathrm{吉特}}_2$。在这里，我们通过中子衍射实验，扫描隧道显微镜（STM）和自旋极化STM测量，密度泛函理论加U计算以及STM模拟研究层间磁性排序。我们得出结论，${铁}_{3-X}{\mathrm{吉特}}_2$ 被铁磁耦合，以捕获磁性和电子特性 ${铁}_{3-X}{\mathrm{吉特}}_2$ 在密度泛函理论中，需要考虑Hubbard U校正。