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IJPAP Vol.45(08) [August 2007] >


Title: Calculation of lattice specific heat of bcc NbZr dilute alloy
Authors: Semalty, P D
Dev, Kapil
Keywords: Lattice specific heat
Dilute alloys
Resonance modes
Localized modes
Green’s function
Force-constant change
Issue Date: Aug-2007
Publisher: CSIR
Abstract: The lattice specific heat at very low temperatures, using a perturbation model which includes the mass change and change in the nearest-neighbour force constants due to interaction between impurity and host atoms has been calculated. In addition to the local perturbation due to mass change and force-constant changes, the effect of volume change has also been taken into account. The calculated results have been compared with the experimental measurements and values of central and non-central force-constant changes have been obtained. The increase in lattice specific heat is explained on the basis of these force-constant changes. The possibility of occurrence of resonance and localized modes from the calculation of resonant denominator have been investigated.
Page(s): 658-662
ISSN: 0019-5596
Source:IJPAP Vol.45(08) [August 2007]

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