The fundamental harmonic of the AC magnetic susceptibility of a Fe(Se,Te) single crystal iron based superconductor has been studied at different AC field amplitudes and frequencies with and without a superimposed DC magnetic field with the aim of analyzing its superconducting properties that can be also suitable for power applications such as the critical current density and the pinning energy in AC regime. From the analysis of the fundamental Cole-Cole plots a finite influence of flux creep phenomena has been detected. Its study, by means of the Arrhenius plots, evidences thermal activation energy U values as high as 10 3 K, whose dependence on the DC and AC fields, and of the temperature, has been also obtained. The magnetic field dependence shows the existence of the strong pinning regime characterized by plastic deformations of the vortex lattice, whereas the temperature dependence of the critical current density J c (T) is consistent with the δl pinning m...

中文翻译：

---

强钉扎Fe（Se，Te）单晶交流磁场中的混合态特性分析

研究了Fe（Se，Te）单晶铁基超导体的交流磁化率的基波在不同的交流场幅值和频率下（有和没有叠加直流磁场的情况），旨在分析其超导特性也适用于功率应用，例如临界电流密度和AC制中的钉扎能量。通过对基本Cole-Cole曲线的分析，可以检测到磁通蠕变现象的有限影响。通过Arrhenius曲线进行的研究表明，热活化能U值高达10 3 K，并且还获得了其对DC和AC场以及温度的依赖性。