Here we report on the magnetic and magneto-transport behavior of Fe-based superconductor with nominal compositions FeSe${}_{1-x}$S${}_x$ ($x=0.1$ and 0.2). The impact of external hydrostatic pressure ($P$) and chemical pressure on the superconducting state of the FeSe system has been investigated in this work. Superconducting transition temperature ($T_c$) is found to be shifted towards higher temperatures with 10% S doping at the Se site of the FeSe alloy. On further increase in the doping concentration (for $x=0.2$), the superconducting $T_c$ decreases. We have also observed a significant effect of external $P$ on the superconducting properties of these S-doped alloys. Different superconducting parameters calculated from our experimental data confirm the type-II superconducting nature of the studied compounds. The signature of flux flow resistance is observed in the isothermal resistivity data as a function of the external magnetic field.

在这里，我们报告了具有标称成分 FeSe 的铁基超导体的磁性和磁输运行为${}_{1-X}$小号${}_X$($X=0.1$和 0.2)。外部静水压力的影响（$磷$) 和对 FeSe 系统超导状态的化学压力在这项工作中进行了研究。超导转变温度（${吨}_C$) 发现在 FeSe 合金的 Se 位置掺杂 10% S 时向更高温度移动。进一步增加掺杂浓度（对于$X=0.2$)，超导${吨}_C$减少。我们还观察到外部的显着影响$磷$关于这些 S 掺杂合金的超导特性。根据我们的实验数据计算出的不同超导参数证实了所研究化合物的 II 型超导性质。在等温电阻率数据中观察到通量流动阻力的特征是外部磁场的函数。