Polarity-Reversal of Exchange Bias in van der Waals FePS₃/Fe₃GaTe₂ Heterostructures.

ABSTRACT: Exchange bias (EB) in antiferromagnetic (AFM)/ferromagnetic heterostructures is crucial for the advancement of spintronic devices and has attracted significant attention. The common EB effect in van der Waals heterostructures features a low blocking temperature (T_b) and a single polarity. In this work, a significant EB effect with a T_b up to 150 K is observed in FePS₃/Fe₃GaTe₂ heterostructures, and in particular, the EB exhibits an unusual temperature-dependent polarity-reversal behavior. Under a high positive field-cooling condition (e.g., μ₀H ≥ 0.5 T), a negative EB field (H_EB) is observed at low temperatures, and with increasing temperature, the H_EB crosses zero at ≈20 K, subsequently becomes positiv

SUBMITTER: Xiao H 

PROVIDER: S-EPMC11672248 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature