Nonlocal Spin Valves Based on Graphene/Fe₃GeTe₂ van der Waals Heterostructures.

ABSTRACT: With recent advances in two-dimensional (2D) ferromagnets with enhanced Curie temperatures, it is possible to develop all-2D spintronic devices with high-quality interfaces using 2D ferromagnets. In this study, we have successfully fabricated nonlocal spin valves with Fe₃GeTe₂ (FGT) as the spin source and detector and multilayer graphene as the spin transport channel. The nonlocal spin transport signal was found to strongly depend on temperature and disappear at a temperature below the Curie temperature of the FGT flakes, which stemmed from the temperature-dependent ferromagnetism of FGT. The spin injection efficiency was estimated to be about 1%, close to that of conventional nonlocal spin valves with transparent contacts between ferromagnetic electrodes and the grap

SUBMITTER: He X 

PROVIDER: S-EPMC9951179 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature