Abstract
The intercalation of magnetic elements in nonmagnetic van der Waals (vdW) materials is an effective way to design different (quasi) 2D magnets and produce exotic properties. More specifically, how exactly the intercalator is distributed within the synthetic crystal can also affect the physical properties substantially. In contrast to conventional 3d transition-metal intercalates of niobium and tantalum dichalcogenides, which commonly have 2×2 or 3×3 type ordered intercalation, we report a disordered intercalation of Co atoms between the vdW gaps of 2H-tantalum disulfide (2H-TaS2). The obtained quasi-vdW ferromagnet Co0.27TaS2 shows both perpendicular magnetic anisotropy and thickness-tunable magnetic properties. More interestingly, the temperature dependence of electrical resistivity shows a semiconductorlike behavior, in contrast to the metallic feature of other analogs in this material family. This unexpected phenomenon can be understood through a variable-range hopping mechanism, which is due to highly disordered intercalation. Moreover, Co0.27TaS2 shows a side-jump scattering dominated anomalous Hall effect, which can also be related to the disordered distribution of Co intercalators.
Original language | English (US) |
---|---|
Article number | 134406 |
Journal | Physical Review B |
Volume | 107 |
Issue number | 13 |
DOIs | |
State | Published - Apr 1 2023 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics