Thermoelastic properties of some cubic close-packed lattices

Abstract

A method is described whereby the strain-dependence of the first few even moments of the vibrational frequency distribution of a crystal can be used to calculate the elastic constants of moderately anharmonic crystals. From the elastic constants at T = 0 the limiting Debye temperature ΘC0 can also be obtained, to the first approximation in the anharmonicity. Detailed calculations at T = 0 are carried out for cubic close-packed lattices with a number of different central force potentials.