Electronic, microstructure, and magnetic performances in MoS2-nanoparticles

Electronic and structural properties are studied at room temperature, whereas the magnetic performances of MoS2-nanoparticles (MoS2-NPs) are studied from room temperature (300 K) down to 5 K within the range of the magnetic field - 10 T to + 10 T. We find that MoS2-NPs display diamagnetic in the temperature range 300-50 K, whereas at approximate to 45 K the M-H hysteresis curve shows the presence of both diamagnetic and ferromagnetic behaviours. The existence of ferromagnetism is significantly enhanced from 40 K down to 5 K, presumably due to Mo-atom, S-vacancies/O-vacancies, defective structure due to the higher density of dangling bonds, and small MoS2-NPs sizes. Different ferromagnetic parameters viz. saturation magnetization, retentivity, and coercivity of MoS2-NP at approximate to 5 K are 55 m emu/g, 45 m emu/g, and 4500 Oe respectively are obtained from the M-H hysteresis curve. The electronic, microstructures and defects are also studied using XPS/UPS and Raman spectrum that correlated/consistence with the magnetic performances of MoS2-NPs. This low temperature (<= 40 K) ferromagnetism in MoS2-NPs could be useful for low temperature promising potential technological magnetic applications.

Automated summary

The electronic and structural properties of MoS2 nanoparticles were studied, and it was found that they exhibit both diamagnetic and ferromagnetic behaviors at around 45 K. The presence of ferromagnetism is significantly enhanced as the temperature decreases, possibly due to factors such as Mo atoms, S vacancies/O vacancies, defective structures, and small nanoparticle sizes. The study suggests the potential technological magnetic applications of MoS2 nanoparticles at low temperatures.