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High Temperature Thermal Expansion of RMn2 Intermetallic Compounds with Heavy Rare Earth Elements

  • I. S. Dubenko
  • I. Y. Gaidukova
  • S. A. Granovsky
  • R. Z. Levitin
  • A. S. Markosyan
  • A. B. Petropavlovsky
  • V. E. Rodimin
  • V. V. Snegirev
Chapter
Part of the NATO Science Series book series (ASHT, volume 55)

Abstract

The temperature variation of the thermal expansion coefficient, α, of cubic and hexagonal Laves phase compounds RMn2(R=Gd ÷ Lu and Y) was measured in a wide temperature range 5-900 K by the X-ray diffraction and dilatometric methods. The value of α is substantially enhanced, up to 55x10-6 K-1, in the paramagnetic region. At high temperatures, 600–800 K, α passes over a maximum and decreases with a further increase of temperature. Some change in α(T) depending on the type of the rare earth ion was discovered suggesting the instability of the Mn electronic structure related to the strong temperature dependence of the mean squared amplitude of spin fluctuations.

Keywords

Thermal Expansion Thermal Expansion Coefficient Spin Fluctuation Strong Temperature Dependence Paramagnetic Region 
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

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • I. S. Dubenko
    • 1
  • I. Y. Gaidukova
    • 2
  • S. A. Granovsky
    • 2
  • R. Z. Levitin
    • 2
  • A. S. Markosyan
    • 2
  • A. B. Petropavlovsky
    • 2
  • V. E. Rodimin
    • 2
  • V. V. Snegirev
    • 2
  1. 1.MIREAMoscowRussia
  2. 2.MV. Lomonosov Moscow State UniversityMoscowRussia

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