期刊
PHYSICAL REVIEW B
卷 80, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.092502
关键词
critical current density (superconductivity); electrical resistivity; iron compounds; magnetisation; superconducting transition temperature; tellurium compounds; type II superconductors
资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
Single-crystalline FeTe0.61Se0.39 with a sharp superconducting transition at T-c similar to 14 K is synthesized via slow furnace cooling followed by low-temperature annealing. The effect of annealing on the chemical and superconducting inhomogeneities is carefully characterized. We also report resistivity, magnetization, and magneto-optical images of this crystal. Based on the Bean model, critical current density is estimated to exceed 1x10(5) A/cm(2) below 5 K under zero field. Weak fish-tail effect is identified at lower temperatures.
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