Nonmagnetic pair-breaking effect in La(Fe1-xZn x)AsO0.85 studied by As75 and La139 NMR and NQR

S. Kitagawa, Y. Nakai, T. Iye, K. Ishida, Y. F. Guo, Y. G. Shi, K. Yamaura, E. Takayama-Muromachi

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19 Citations (Scopus)


As75 and La139 NMR and nuclear quadrupole resonance (NQR) studies on Zn-substituted LaFeAsO0.85 have been performed to microscopically investigate the Zn-impurity effects. Although superconductivity in LaFeAsO 0.85 disappears by 3% Zn substitution, we found that NMR/NQR spectra and NMR physical quantities in the normal state are hardly changed, indicating that the crystal structure and electronic states are not modified by Zn substitution. Our results suggest that the suppression of superconductivity by Zn substitution is not due to the change of the normal-state properties, but due to strong nonmagnetic pair-breaking effect to superconductivity.

Original languageEnglish
Article number180501
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
Publication statusPublished - May 6 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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