Synthesis, Structure and Magnetic Properties of New Layered Iron-Oxychalcogenide Na2Fe2OSe2

J. B. He; D. M. Wang; H. L. Shi; H. X. Yang; J. Q. Li; G. F. Chen

doi:10.1103/PhysRevB.84.205212

Synthesis, Structure and Magnetic Properties of New Layered Iron-Oxychalcogenide Na2Fe2OSe2

Strongly Correlated Electrons 2013-05-29 v2

Authors: J. B. He , D. M. Wang , H. L. Shi , H. X. Yang , J. Q. Li , G. F. Chen

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Abstract

A new layered iron-oxychalcogenide Na2Fe2OSe2 has been synthesized and structurally characterized by powder X-ray diffraction. The structure is formed by alternate stacking of the newly discovered [Fe2OSe2] blocks and double layers of Na. Conductivity study shows that Na2Fe2OSe2 is a semiconductor with activation energy of 0.26 eV. Magnetic susceptibility and heat capacity measurements reveal an antiferromagnetic phase transition occurs at TN=73 K. A broad maximum of magnetic susceptibility and a slow decay of the specific heat above TN, arises as a result of two-dimensional short-range spin correlation.

Keywords

layered iron-oxychalcogenide Na2Fe2OSe2 antiferromagnetic phase transition semiconductor short-range spin correlation powder X-ray diffraction magnetic susceptibility

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@article{arxiv.1104.2176,
  title  = {Synthesis, Structure and Magnetic Properties of New Layered Iron-Oxychalcogenide Na2Fe2OSe2},
  author = {J. B. He and D. M. Wang and H. L. Shi and H. X. Yang and J. Q. Li and G. F. Chen},
  journal= {arXiv preprint arXiv:1104.2176},
  year   = {2013}
}

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4 pages, 4 figures

Synthesis, Structure and Magnetic Properties of New Layered Iron-Oxychalcogenide Na2Fe2OSe2

Abstract

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