High-temperature heat capacity and lattice anharmonicity of LiGaO<SUB>2</SUB> by H. Neumann

Crystal Research and Technology

Cryst. Res. Technol. 39, 245 (2004) - Abstract -

High-temperature heat capacity and lattice anharmonicity of LiGaO₂

H. Neumann

EOMC, Fritz-Siemon-Strasse 26/111, 04347 Leipzig, Germany

Keywords	heat capacity, lattice anharmonicity, Grüneisen functions
PACS	65.40.Ba, 81.05.Je
DOI	10.1002/crat.200310178

The first three even moments of the phonon density of states of LiGaO₂ and the anharmonic contribution to the heat capacity at constant volume of the compound are estimated from experimental heat capacity data. The effect of lattice anharmonicity is discussed in terms of perturbation theory. The temperature dependent principal Grüneisen functions of LiGaO₂ are calculated. The results obtained for LiGaO₂ are compared with existing literature for other ternary lithium compounds.

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