Iron substitution in NdCoAsO: Crystal structure and magnetic phase diagram

@article{McGuire2010IronSI,
  title={Iron substitution in NdCoAsO: Crystal structure and magnetic phase diagram},
  author={Michael A. McGuire and Athena S Sefat and Brian C. Sales and David G. Mandrus},
  journal={Physical Review B},
  year={2010},
  volume={82},
  pages={092404}
}
The effects of replacing small amounts of Co with Fe in NdCoAsO are reported. Polycrystalline materials with compositions NdCo{sub 1-x}Fe{sub x}AsO (x = 0.05, 0.10, 0.15, and 0.20) are studied and the results compared to previous reports for NdCoAsO. Rietveld analysis of powder x-ray diffraction data shows that as Fe replaces Co on the transition metal (T) site, the T-As distance increases, and the As tetrahedra surrounding the T site become more regular. Electrical resistivity and… 
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