1. Chalcogen (O2, S, Se, Te) atmosphere annealing induced bulk superconductivity in Fe1+yTe1−xSex single crystal.
- Author
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Sun, Y., Tsuchiya, Y., Yamada, T., Taen, T., Pyon, S., Shi, Z.X., and Tamegai, T.
- Subjects
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CHALCOGENS , *SINGLE crystals , *IRON compounds , *SIMULATED annealing , *SUPERCONDUCTIVITY , *CRITICAL current density (Superconductivity) , *MAGNETOOPTICS , *ISOTROPIC properties - Abstract
We reported a detailed study of Fe 1+ y Te 0.6 Se 0.4 single crystals annealed in the atmosphere of chalcogens (O 2 , S, Se, Te). After annealing with appropriate amount of chalcogens, Fe 1+ y Te 0.6 Se 0.4 single crystals show T c higher than 14 K with a sharp transition width ∼1 K. Critical current density J c for the annealed crystals reach a very high value ∼2–4 × 10 5 A/cm 2 under zero field, and is also robust under applied field at low temperatures. Magneto-optical imaging reveal that the J c is homogeneously distributed in the annealed crystals and isotropic in the ab -plane. Our results show that annealing in the atmosphere of chalcogens can successfully induce bulk superconductivity in Fe 1+ y Te 0.6 Se 0.4 . [ABSTRACT FROM AUTHOR]
- Published
- 2014
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