Research Information System
Journal of Magnetism and Magnetic Materials, vol.638, 2026 (SCI-Expanded, Scopus)
In this study, we present a detailed magnetic investigation of the YFe2-xPtxSb2 (x = 0, 0.01, and 0.05) compounds synthesized via solid-state sintering. All samples crystallize in the ThCr 2 Si 2 -type structure (space group I4/mmm ) at room temperature. Low-field DC magnetic susceptibility measurements were performed on all compositions. The compounds exhibit pronounced magnetic irreversibility at low fields below the coercivity, which is attributed to spin freezing at low temperatures. At elevated temperatures, their magnetic susceptibility follows the modified Curie–Weiss law with high accuracy. Magnetic analyses also indicate the onset of superconductivity below T ≈ 10 K. The critical current density ( J c ) and the normalized pinning force ( F p /F p, max) were systematically examined as functions of the applied magnetic field. Furthermore, the F p /F p,max curves plotted against the reduced field h = H/H irr scale well according to the Dew–Hughes model. Finally, the magnetic state of YFe2Sb2 is shown to be strongly influenced by both composition and annealing conditions. High-temperature annealing enhances magnetization by increasing Fe occupancy on the Fe sites, thereby favoring full Fe ordering.