On determination of the Grüneisen parameter from experimental data

Magomedov, M.
September 2010
Technical Physics;Sep2010, Vol. 55 Issue 9, p1382
Academic Journal
It is shown that the widely used method for determining Grüneisen parameter γ of a solid from experimental data on thermal expansion coefficient α, elastic modulus B, volume V, and heat capacity C, γ = α B V/ C, is valid only when the Debye temperature Θ does not depend on temperature T. It is shown that if function Θ exhibits a temperature dependence, this method becomes not quite correct (especially for quantum crystals). A correct expression is derived for calculating the Grüneisen parameter and the upper and lower bounds for function γ( T) are determined.


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