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Phonon Contribution in Thermodynamics and Transport Properties of Ultrathin Ceramic Films

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Jaćimovski S., Šetrajčić J., Jaćimovski M., Stojanović V.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 3
811-820
EN
The dispersion law, density states of phonons, thermodynamics properties and thermal conductivity was analyzed in this paper. It has been shown that at low temperatures, thermal conductivity of thin film is considerably lower that of bulk-structure. It turned out that phonons in thin film require activation energy for exciting. This leads to extremely low specific heat and specific conductivity at low temperatures. Consequences of quoted facts were discussed in detail and their influence on kinetic and thermodynamic properties of thin films is estimated.
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