Magnetic Order of the Iron Spins in NdOFeAs

Ying Chen; J. W. Lynn; J. Li; G. Li; G. F. Chen; J. L. Luo; N. L. Wang; Pengcheng Dai; C. dela Cruz; H. A. Mook

doi:10.1103/PhysRevB.78.064515

Magnetic Order of the Iron Spins in NdOFeAs

Superconductivity 2009-11-13 v2 Strongly Correlated Electrons

Authors: Ying Chen , J. W. Lynn , J. Li , G. Li , G. F. Chen , J. L. Luo , N. L. Wang , Pengcheng Dai , C. dela Cruz , H. A. Mook

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Abstract

Polarized and unpolarized neutron diffraction measurements have been carried out to investigate the iron magnetic order in undoped NdOFeAs. Antiferromagnetic order is observed below 141(6) K, which is in close proximity to the structural distortion observed in this material. The magnetic structure consists of chains of parallel spins that are arranged antiparallel between chains, which is the same in-plane spin arrangement as observed in all the other iron oxypnictide materials. Nearest-neighbor spins along the c-axis are antiparallel like LaOFeAs. The ordered moment is 0.25(7) muB, which is the smallest moment found so far in these systems.

Keywords

NdOFeAs iron magnetic order antiferromagnetic order neutron diffraction structural distortion magnetic structure ordered moment iron oxypnictide

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@article{arxiv.0807.0662,
  title  = {Magnetic Order of the Iron Spins in NdOFeAs},
  author = {Ying Chen and J. W. Lynn and J. Li and G. Li and G. F. Chen and J. L. Luo and N. L. Wang and Pengcheng Dai and C. dela Cruz and H. A. Mook},
  journal= {arXiv preprint arXiv:0807.0662},
  year   = {2009}
}

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7 pages, 4 figures

Magnetic Order of the Iron Spins in NdOFeAs

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