Characterization of superconductivity in FeTe0.61Se 0.39 single crystal with Tc ∼ 14 K

T. Taen, Y. Tsuchiya, Y. Nakajima, T. Tamegai

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7 Citations (Scopus)

Abstract

We report resistivity, magnetization, critical current density, and the upper critical field of the single crystalline FeTe0.61Se 0.39 with Tc ∼ 14 K synthesized via slow-furnace cooling followed by low-temperature annealing. Magneto-optical observation confirms the uniformity of current flow in the crystal and the critical current density is estimated to exceed 1 × 105 A/cm2 below 5 K under zero field. Weak fish-tail effect is identified at lower temperatures. Upper critical field along ab-plane at T = 0 K estimated from WHH theory exceeds 1000 kOe, which is much higher than that in Ba(Fe0.9Co 0.1)2As2.

Original languageEnglish
Pages (from-to)S391-S393
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2010 Dec

Keywords

  • Iron-chalcogenide
  • Magneto-optical imaging
  • Upper critical field

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