Local Electronic and Crystal Structure of Magnetic RCo2As2 (R = La, Ce, Pr, Eu)

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• 作者：A. P. Menushenkov (1)
  A. A. Yaroslavtsev (1) (2) (3)
  A. Y. Geondzhian (1)
  R. V. Chernikov (4)
  Y. V. Zubavichus (5)
  X. Tan (6)
  M. Shatruk (6)
  
  1. National Research Nuclear University (Moscow Engineering Physics Institute) ; 115409 ; Moscow ; Russia
  2. European XFEL GmbH ; 22761 ; Hamburg ; Germany
  3. I. Institut f眉r Theoretische Physik ; Universit盲t Hamburg ; 20355 ; Hamburg ; Germany
  4. DESY Photon Science ; D-22607 ; Hamburg ; Germany
  5. NRC 鈥淜urchatov Institute鈥? 123182 ; Moscow ; Russia
  6. Department of Chemistry and Biochemistry ; Florida State University ; Tallahassee ; FL ; 32306 ; USA
  
• 关键词：Cerium ; Europium ; Cobalt ; Valence ; Magnetic ; XAS
• 刊名：Journal of Superconductivity Incorporating Novel Magnetism
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：28
• 期：3
• 页码：995-997
• 全文大小：221 KB
• 参考文献：1. Hossain, Z, Geibel, C, Senthilkumaran, N (2004) Phys. Rev. B 69: pp. 014422 f="http://dx.doi.org/10.1103/PhysRevB.69.014422" target="_blank" title="It opens in new window">CrossRef
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Superconductivity, Superfluidity and Quantum Fluids
  Magnetism and Magnetic Materials
  Condensed Matter
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1557-1947

文摘

The experimental X-ray absorption data on the recently prepared magnetic arsenides RCo2As2 (R = rare earth) are provided. The oxidation state of rare-earth ions is explored by means of the X-ray absorption near edge structure (XANES) spectroscopy. Ce and Eu exhibit the intermediate valence state. The rare-earth valence instability sensitive to external perturbations opens the way for the influencing the magnetic state of RCo2As2 compounds.