Enhanced ferromagnetism in artificially stretched lattice in quasi two-dimensional Cr2Ge2Te6

Abstract

In the fundamental understanding of magnetic interactions between atoms in solids, the crystal lattice is one of the key parameters. As the effective tool for controlling the lattice using tensile stress is limited, there are only few demonstrations of the control in magnetic properties with expanding the lattice structure. Here, we observe that the Curie temperature (Tc) of quasi two-dimensional Cr2Ge2Te6 with NiO overlayer doubles from ~60 K to ~120 K, describe a clear correlation of magnetic properties with lattice expansion, which is characterized by several probes and computational approaches, and address on the mechanisms leading to the increase in Tc via the change in exchange interactions.

References in corpus (6)

• Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Increased Curie temperature and enhanced perpendicular magneto anisotropy of Cr2Ge2Te6/NiO heterostructure
• Unusual magnetism of layered chromium sulfides MCrS2 (M=Li, Na, K, Ag, and Au)
• First-principles studies of spin-phonon coupling in Cr2Ge2Te6 monolayer
• Dzyaloshinskii-Moriya interaction and magnetic skyrmions induced by curvature

Cited by in corpus (1)

• Near room-temperature ferromagnetism from double-exchange in the van der Waals material CrGeTe${}_3$: evidence from optical conductivity under pressure