Unconventional Hall effect and its variation with Co-doping in van der Waals Fe3GeTe2

TL;DR

This study investigates how Co-doping influences the magnetic and magnetotransport properties of Fe3GeTe2, revealing an unusual Hall effect linked to complex spin textures, which could advance 2D vdW spintronic devices.

Contribution

It demonstrates the impact of Co-doping on the Hall effect and spin textures in Fe3GeTe2, offering insights for designing 2D vdW spintronic materials.

Findings

Co-doping modifies the Hall effect behavior.

Unusual Hall effect linked to complex spin textures.

Results suggest potential for tailored spin textures in 2D vdW materials.

Abstract

Two-dimensional (2D) van der Waals (vdW) magnetic materials have attracted a lot of attention owing to the stabilization of long-range magnetic order down to atomic dimensions, and the prospect of novel spintronic devices with unique functionalities. The clarification of the magnetoresistive properties and its correlation to the underlying magnetic configurations is essential for 2D vdW-based spintronic devices. Here, the effect of Co-doping on the magnetic and magnetotransport properties of Fe3GeTe2 have been investigated. Magnetotransport measurements reveal an unusual Hall effect behavior whose strength was considerably modified by Co-doping and attributed to arise from the underlying complicated spin textures. The present results provide a clue to tailoring of the underlying interactions necessary for the realization of a variety of unconventional spin textures for 2D vdW FM-based spintronics.