Investigation of structural and magnetic properties of Fe and Cu doped MoS2 thin films

In this study, structural and magnetic properties of pure and Fe/Cu-doped Fe/Cux:MoS2 (x: 0.50%, 0.75%, and 1.00%) thin film materials were investigated. Crystallizations of films were ensured decomposing of ammonium tetrathiomolybdate (ATTM) precursor at various sintering temperatures under N2 gas flow. Structural and morphological characteristics of all produced samples were investigated by measuring X-Ray Diffraction (XRD), Raman spectroscopy and Scanning Electron Microscope (SEM). It is determined from Raman spectroscopy results that the characteristic vibration modes of 2H-MoS2 formed after performing optimization samples. SEM images of pure sample show that MoS2 crystals formed as back-to-back triangle shape. This shape of crystal was changed to nanorod by doping Fe atoms in to the main structure. Magnetic properties of samples were investigated by using vibration sample magnetometer (VSM). It is observed that magnetic transition temperature of samples decreases when Fe atom is added to the main structure. The magnetization transition temperatures are found as 247.6 and 95.5 K for pure (0.95% wt. ATTM) and 0.75% Fe-doped MoS2. According to the magnetic hysteresis curves measured at 5 K, the magnetic ordering of pure and 0.75% Fe-doped samples are ferro/ferri-magnetic. For Fe-doped samples, all samples, except 0.75% Fe-doped sample, show diamagnetic characteristic at room temperature. In addition, saturation magnetization value increases with introducing of Fe atom into the main structure. For Cu-doped samples, the diamagnetic behavior was observed at room temperature.