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High‐temperature heat capacity and lattice anharmonicity of LiGaO 2
Author(s) -
Neumann H.
Publication year - 2004
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.200310178
Subject(s) - anharmonicity , heat capacity , ternary operation , thermodynamics , specific heat , lattice (music) , chemistry , phonon , condensed matter physics , lattice vibration , perturbation (astronomy) , physics , quantum mechanics , computer science , acoustics , programming language
The first three even moments of the phonon density of states of LiGaO 2 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 LiGaO 2 are calculated. The results obtained for LiGaO 2 are compared with existing literature for other ternary lithium compounds. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)