Microscopic coexistence of antiferromagnetic order and superconductivity in Ba 0.77K 0.23Fe 2As 2

Z. Li, R. Zhou, Y. Liu, D. L. Sun, J. Yang, C. T. Lin, Guo Qing Zheng

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42 Citations (Scopus)

Abstract

We report 75As nuclear magnetic resonance studies on an underdoped single-crystal Ba 0.77K 0.23Fe 2As 2 with T c=16.5 K. Below T N=46 K, the NMR peaks for Hc split and those for Ha shift to higher frequencies, which indicates that an internal magnetic field along the c axis develops below T N. The spin-lattice relaxation rate 1/T 1 measured at the shifted peak with Ha, which experiences the internal field, shows a distinct decrease below T c0H=12T)=16 K, following a T3 relation at low temperatures. Our results show unambiguously that antiferromagnetic order and superconductivity coexist microscopically. The unusual superconducting state with the coexisting magnetism is highlighted.

Original languageEnglish
Article number180501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number18
DOIs
Publication statusPublished - Nov 5 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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