Thermally activated flux flow (TAFF) and flux-flow Hall effect (FFHE) of Fe(Te,S) single crystal in the mixed state are studied in magnetic fields up to 35 T. Thermally activated energy (TAE) is analyzed using conventional Arrhenius relation and modified TAFF theory which is closer to experimental results. The results indicate that there is a crossover from single-vortex pinning region to collective creep pinning region with increasing magnetic field. The temperature dependence of TAE is different for H∥ab and H∥c . On the other hand, the analysis of FFHE in the mixed state indicates that there is no Hall sign reversal. We also observe scaling behavior |ρxy(H)|=Aρxx(H)β .
Physical Review B
- Pub Date:
- October 2010
- Mixed states critical fields and surface sheaths;
- Ternary quaternary and multinary compounds;
- Condensed Matter - Superconductivity
- 7pages, 5figures