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Grüneisen's law and particularities of electronic excitations in quasicrystals

Low Temp. Phys. 35, 536 (2009); doi:10.1063/1.3168640

Issue Date: July 2009

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A. F. Prekul, N. I. Shchegolikhina, and S. M. Podgornykh
Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, ul. Sof'i Kovalevskoi 18, Ekaterinburg 620041, Russia
Grüneisen's law according to which the temperature dependence of the lattice specific heat at constant volume is similar to that of the thermal expansion coefficient is checked experimentally for the icosahedral phase of Al63Cu25Fe12. The specific heat CP(T) and linear thermal expansion coefficient alphaL(T) are measured in the temperature interval 1.8–400  K. It is found that Grüneisen's law holds quite satisfactorily in the temperature range 200–400  K. Significant deviations from this law are found at lower temperatures. These deviations are due to the presence of “excess” specific heat of the Schottky anomaly type. It is shown that this contribution is of electronic origin. ©2009 American Institute of Physics
History: Submitted 20 February 2009
Permalink: http://link.aip.org/link/?LTPHEG/35/536/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.44.Br
    Structure of quasicrystals
  • 73.30.+y
    Surface double layers, Schottky barriers, and work functions
  • 65.40.De
    Thermal expansion; thermomechanical effects (crystalline solids)
  • 65.40.Ba
    Heat capacity of crystalline solids
  • YEAR: 2009

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ISSN:
1063-777X (print)   1090-6517 (online)
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