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.

References in corpus (5)

• 2D materials and van der Waals heterostructures
• Itinerant Antiferromagnetism in RuO${}_2$
• Direct observations of chiral spin textures in van der Waals magnet Fe3GeTe2 nanolayers
• On the origin and the manipulation of ferromagnetism in Fe${}_3$GeTe${}_2$: defects and dopings
• Spectroscopic Signature for Local-moment Magnetism in van der Waals Ferromagnet Fe${}_3$GeTe${}_2$