| Autor: |
Yu Liu (刘育), Zhixiang Hu (胡之翔), Xiao Tong (佟晓), Eric D. Bauer, C. Petrovic |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Physical Review Research, Vol 4, Iss 1, p 013048 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2643-1564 |
| DOI: |
10.1103/PhysRevResearch.4.013048 |
| Popis: |
We report a detailed study of electrical and thermal transport properties in 2H-M_{x}TaS_{2} (M=Mn, Co) magnets where M atoms are intercalated in the van der Waals gap. The intercalation induces ferromagnetism (FM) with an easy-plane anisotropy in 2H-Mn_{x}TaS_{2}, but FM with a strong uniaxial anisotropy in 2H-Co_{0.22}TaS_{2}, which finally evolves into a three-dimensional antiferromagnetism (AFM) in 2H-Co_{0.34}TaS_{2}. Temperature-dependent electrical resistivity shows metallic behavior for all samples. Thermopower is negative in the whole temperature range for 2H-Co_{x}TaS_{2}, whereas the sign changes from negative to positive with increasing Mn for 2H-Mn_{x}TaS_{2}. The diffusive thermoelectric response dominates in both high- and low-temperature ranges for all samples. A clear kink in electrical resistivity, a weak anomaly in thermal conductivity, as well as a slope change in thermopower were observed at the magnetic transitions for 2H-Mn_{0.28}TaS_{2} (T_{c}≈ 82 K) and 2H-Co_{0.34}TaS_{2} (T_{N}≈ 36 K), respectively, albeit weaker for lower x crystals. Co-intercalation promoted FM to AFM transition is further confirmed by Hall resistivity; the sign change of the ordinary Hall coefficient indicates a multiband behavior in 2H-Co_{x}TaS_{2}. |
| Databáze: |
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