Antiferromagnetic fluctuations in iron pnictide superconductor BaFe 2(As0.67P0.33)2 investigated by 31P NMR

Yusuke Nakai, Tetsuya Iye, Shunsaku Kitagawa, Kenji Ishida, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda, Takahito Terashima

Research output: Contribution to journalArticle

Abstract

31P NMR was performed on the normal state in the newly discovered iron pnictide superconductor BaFe2(As0.67P 0.33)2 with maximum Tc of 30 K. The Knight shift is temperature-independent while the nuclear spin-lattice relaxation rate divided by temperature (T1T)-1 exhibits a more than twofold increase on cooling. This contrasting behavior clearly indicates the development of low-lying antiferromagnetic fluctuations in BaFe2(As 0.67P0.33)2 as observed in (Ba 1-xKx)Fe2As2. The observed low-lying antiferromagnetic fluctuations may be universal in optimally doped "122" superconductors, in contrast to "1111" superconductors.

Original languageEnglish
Pages (from-to)S420-S421
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 1 2010

Keywords

  • Antiferromagnetic fluctuation
  • Iron pnictides
  • NMR
  • Superconductivity

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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    Nakai, Y., Iye, T., Kitagawa, S., Ishida, K., Kasahara, S., Shibauchi, T., Matsuda, Y., & Terashima, T. (2010). Antiferromagnetic fluctuations in iron pnictide superconductor BaFe 2(As0.67P0.33)2 investigated by 31P NMR. Physica C: Superconductivity and its applications, 470(SUPPL.1), S420-S421. https://doi.org/10.1016/j.physc.2010.01.047