Superconducting anisotropy in single-crystalline Ba(Fe 0.93Co0.07)2As2 near Tc

T. Nojima, Y. Honda, Y. Nakajima, T. Tamegai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The superconducting anisotropy γ has been studied on single-crystalline Ba(Fe0.93Co0.07)2As 2 (Tc=22.5K) at temperatures T≥20K and fields H≤10T by measuring magnetic torque τ as a function of angle θ between the c axis and the H direction. The reversible part in τ(θ) can be well-described with γ=3-3.5, which is almost T and H independent within the measurement range. The result manifests that this material, known as the multigap superconductor, behaves as a simple anisotropic superconductor at least near Tc. The irreversible part in τ(θ) shows broad peak at θ=90°, indicating the absence of strong layer pinning.

Original languageEnglish
Pages (from-to)S813-S814
JournalPhysica C: Superconductivity and its applications
Issue numberSUPPL.1
Publication statusPublished - 2010 Dec


  • 122-Type iron pnictides
  • Anisotropy
  • Torque magnetometry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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