Temperature Dependence of the Debye Temperatures of Aluminum, Lead, and Beta Brass by an X-Ray Method

Abstract

The temperature dependence of the Debye temperature of aluminum, lead, and beta brass was determined by measuring the integrated intensity of a high angle x-ray diffraction peak from each of the materials as a function of temperature. This measured temperature dependence agrees well with the corresponding function obtained from elastic constant data, although it is determined by much higher lattice frequencies. In agreement with the elastic constant measurements, evidence is found for an explicit temperature dependence beyond that resulting from the simple dependence of Debye temperature on volume.