DOI: https://doi.org/10.55373/mjchem.v27i5.51

Keywords: AC susceptibility; molybdenum sulfide; microstructure; X-ray diffraction

Abstract

The bismuth-based high temperature with composition Bi_1.6Pb_0.4Sr₂CaCu₂O₈ (MoS₂)x (Bi-2212) has been prepared using the solid-state reaction process, and the value of x = 1 to 5 wt. %. The size of the MoS₂ was 90 nanometers. The samples were characterized using the four-point probe electrical resistance measurements, AC susceptibility, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The addition of nanosized MoS₂ showed no changes in the orthorhombic structure and microstructure. The non-added samples recorded the highest transition temperature (T_{c onset} = 85 K). All samples exhibited superconducting properties except for higher concentrations of MoS₂. Sample with x = 1 wt. % showed the highest peak transition (Tp) of the imaginary part of the AC susceptibility. The critical current density at Tp was between 20.8 and 31.3 A cm^-2. These findings suggest that adding low levels of MoS₂ improved performance in the superconducting properties while maintaining the structural integrity of the crystal lattice.