Physics – Condensed Matter – Superconductivity
Scientific paper
2010-10-01
Phys. Rev. B 82, 134525 (2010)
Physics
Condensed Matter
Superconductivity
7pages, 5figures
Scientific paper
10.1103/PhysRevB.82.134525
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 |Rhoxy(H)| = A*Rhoxx(H)^beta.
Choi Eun Sang
Hu Rongwei
Lei Hechang
Petrovic C.
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