Interlayer magnetism in Fe3-xGeTe2

Abstract

Fe${}_{3-x}$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 Fe${}_{3-x}$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 Fe${}_{3-x}$GeTe${}_2$ are coupled ferromagnetically and that in order to capture the magnetic and electronic properties of Fe${}_{3-x}$GeTe${}_2$ within density functional theory, Hubbard U corrections need to be taken into account.

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• Van der Waals density functionals applied to solids
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Cited by in corpus (6)

• Magnetic ground state and electron doping tuning of Curie temperature in Fe${}_3$GeTe${}_2$: first-principles studies
• Large magneto-optical effect and magnetic anisotropy energy in two-dimensional metallic ferromagnet Fe${}_3$GeTe${}_2$
• Effects of Fe deficiency and Co substitution in polycrystalline and single crystals of Fe${}_3$GeTe${}_2$
• FePd2Te2: An Anisotropic Two-Dimensional Ferromagnet with One-Dimensional Fe Chains
• Relating spin-polarized STM imaging and inelastic neutron scattering in the van-der-Waals ferromagnet Fe3GeTe2
• X-ray spectra in magnetic van der Waals materials Fe${}_3$GeTe${}_2$, CrI${}_3$, and CrGeTe${}_3$: a first-principles study