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JETP Letters

, Volume 99, Issue 3, pp 164–168 | Cite as

Coexistence of long range magnetic order and intervalent state of Eu in EuCu2(Si x Ge1 − x )2: Evidence from neutron diffraction and spectroscopic studies

  • P. A. Alekseev
  • K. S. Nemkovski
  • D. P. Kozlenko
  • A. P. Menushenkov
  • A. A. Yaroslavtsev
  • A. V. Gribanov
  • E. S. Clementyev
  • C. Pantalei
  • B. Klobes
  • R. P. Hermann
Condensed Matter

Abstract

Experimental results of the X-ray absorption spectroscopy, Mössbauer spectroscopy (isomer shift) and neutron diffraction are presented for the series of EuCu2(Si x Ge1 − x )2 polycrystalline samples (0 < x < 0.75). Homogeneous intermediate valence state is established for Eu ions as well as long range magnetically ordered state at the temperatures below 10–15 K. Observation of the ordered magnetic moments at Eu site gives rise to the experimental statement for the coexistence of valence fluctuations and long range magnetic order takes place in the wide range of Ge concentrations for this substance.

Keywords

Neutron Diffraction JETP Letter Isomer Shift Neutron Diffraction Pattern Magnetic Phase Diagram 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Inc. 2014

Authors and Affiliations

  • P. A. Alekseev
    • 1
    • 2
  • K. S. Nemkovski
    • 3
  • D. P. Kozlenko
    • 4
  • A. P. Menushenkov
    • 2
  • A. A. Yaroslavtsev
    • 2
  • A. V. Gribanov
    • 5
  • E. S. Clementyev
    • 1
    • 2
    • 6
  • C. Pantalei
    • 7
  • B. Klobes
    • 8
  • R. P. Hermann
    • 8
    • 9
  1. 1.National Research Centre Kurchatov InstituteMoscowRussia
  2. 2.National Research Nuclear University MEPhIMoscowRussia
  3. 3.Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbHOutstation at MLZGarchingGermany
  4. 4.Frank Laboratory for Neutron PhysicsJoint Institute for Nuclear ResearchDubna, Moscow regionRussia
  5. 5.Faculty of ChemistryMoscow State UniversityMoscowRussia
  6. 6.Institute for Nuclear ResearchRussian Academy of SciencesTroitsk, Moscow regionRussia
  7. 7.Laboratoire Léon Brillouin-UMR12 CNRS-CEACEA SaclayGif-sur-YvetteFrance
  8. 8.Jülich Centre for Neutron Science JCNS and Peter Grünberg Institute PGI, JARA-FITForschungszentrum Jülich GmbHJülichGermany
  9. 9.Faculté des SciencesUniversité de LiègeLiègeBelgium

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