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 journalArticlepeer-review

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 2010
Externally publishedYes

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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