75As NMR studies of superconducting Ba0.72K 0.28Fe2As2

Z. Li, Kazuaki Matano, D. L. Sun, G. L. Sun, C. T. Lin, Masanori Ichioka, Guo-Qing Zheng

Research output: Contribution to journalArticle

Abstract

We have performed 75As nuclear magnetic resonance measurements on a single crystal of the hole-doped superconductor Ba0.72K 0.28Fe2As2 (Tc = 31.5 K). The spin-lattice relaxation rate 1/T1 decreases below Tc with no coherence peak and shows a step-wise variation at low temperatures, which is indicative of multiple superconducting gaps. In the normal state, we find that Fe antiferromagnetic spin fluctuations are anisotropic.

Original languageEnglish
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 2010

Fingerprint

Magnetic resonance measurement
Spin fluctuations
Spin-lattice relaxation
Superconducting materials
Nuclear magnetic resonance
Single crystals
nuclear magnetic resonance
spin-lattice relaxation
Temperature
single crystals

Keywords

  • Anisotropic spin fluctuations
  • BaK FeAs
  • NMR
  • Superconductivity

ASJC Scopus subject areas

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

Cite this

75As NMR studies of superconducting Ba0.72K 0.28Fe2As2. / Li, Z.; Matano, Kazuaki; Sun, D. L.; Sun, G. L.; Lin, C. T.; Ichioka, Masanori; Zheng, Guo-Qing.

In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.

Research output: Contribution to journalArticle

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AU - Lin, C. T.

AU - Ichioka, Masanori

AU - Zheng, Guo-Qing

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