Premium
Specific Heat and Lattice Anharmonicity in ZnSiP 2 and ZnSiAs 2
Author(s) -
Neumann H.,
Kühn G.,
Möller W.
Publication year - 1986
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170210725
Subject(s) - anharmonicity , specific heat , thermodynamics , atmospheric temperature range , thermal expansion , lattice (music) , thermal , chemistry , condensed matter physics , materials science , physics , acoustics
The molar specific heat at constant pressure was measured for ZnSiP 2 in the temperature range from 300 to 400 K and for ZnSiAs 2 from 300 to 500 K. An analysis of the experimental data showed that the contribution to the specific heat due to lattice anharmonicity can be described by a polynomial of third order in the temperature. Predictions are made regarding the expected temperature dependence of the thermal expansion coefficients and compared with existing experimental data.