Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy

H. Gretarsson, A. Lupascu, Jungho Kim, D. Casa, T. Gog, W. Wu, S. R. Julian, Z. J. Xu, J. S. Wen, G. D. Gu, R. H. Yuan, Z. G. Chen, N. L. Wang, S. Khim, K. H. Kim, M. Ishikado, I. Jarrige, S. Shamoto, J. H. Chu, I. R. FisherYoung June Kim

研究成果: Article同行評審

99 引文 斯高帕斯(Scopus)

摘要

We report a Fe Kβ x-ray emission spectroscopy study of local magnetic moments in various iron-based superconductors in their paramagnetic phases. Local magnetic moments are found in all samples studied: PrFeAsO, Ba( Fe,Co)2As2, LiFeAs, Fe1+x(Te,Se), and A 2Fe4Se5 (where A=K, Rb, and Cs). The moment size is independent of temperature or carrier concentration but varies significantly across different families. Specifically, all iron pnictide samples have local moments of about 1μB/Fe, while FeTe and K 2Fe4Se5 families have much larger local moments of ∼2μB/Fe and ∼3.3μB/Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.

原文English
文章編號100509
期刊Physical Review B - Condensed Matter and Materials Physics
84
發行號10
DOIs
出版狀態Published - 2011 九月 22

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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