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

Research output: Contribution to journalArticle

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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

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Superconductivity
superconductivity
Nuclear magnetic resonance
nuclear magnetic resonance
Spin-lattice relaxation
Magnetism
spin-lattice relaxation
Single crystals
Magnetic fields
shift
single crystals
magnetic fields
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Microscopic coexistence of antiferromagnetic order and superconductivity in Ba 0.77K 0.23Fe 2As 2 . / Li, Z.; Zhou, R.; Liu, Y.; Sun, D. L.; Yang, J.; Lin, C. T.; Zheng, Guo-Qing.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 86, No. 18, 180501, 05.11.2012.

Research output: Contribution to journalArticle

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AU - Lin, C. T.

AU - Zheng, Guo-Qing

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