75As NMR Observation of Anisotropic Spin Fluctuations in the Ba[(Fe0.92Co0.08)2]2As2 Superconductor (Tc = 22 K) Journal Articles uri icon

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abstract

  • We demonstrate that the anisotropy R of the paramagnetic spin fluctuations grows toward Tc at 75As sites in the optimally electron-doped superconductor Ba[(Fe0.92Co0.08)2]2As2, with stronger spin fluctuations along the c-axis. Our finding is in remarkable contrast with the case of high Tc cuprates, where R is independent of temperature above Tc.

authors

  • Imai, Takashi
  • Ning, Fanlong
  • Ahilan, Kanagasingham
  • Sefat, Athena
  • Jin, Rongying
  • McGuire, Michael
  • Sales, Brian
  • Mandrus, David

publication date

  • April 9, 2009