Abstract
The effect of atomic substitution of Te in iron based superconductors FeSe (1:1 type), which exhibits the simplest crystal structure among the iron-based superconductors, has been investigated in terms of structural, electronic transport, and magnetic properties. Polycrystalline samples with nominal Se:Te in FeSe1−x Te x samples for x=0.5350 °C, 0.5700 °C, 0.6700 °C, and 0.75700 °C were synthesized by the solid-state reaction method. In overall samples, it has been observed that the most superconducting properties seen in x=0.6700 °C samples, for 0.5350 °C and 0.5700 °C samples latter showed better superconducting properties as dc magnetic susceptibility, ac susceptibility, and resistivity measurements and sample homogeneity. T c enhancement is well correlated with the Te substitution up to 75 %.
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