Lattice thermal conductivity of NaF in the temperature range (2-100) °k

Abstract

The separate contributions of longitudinal and transverse phonons towards the lattice thermal conductivity of NaF have been calculated in the entire temperature range (2-100) °K using the relation τ3ph-1g(ω)Tme-θαT for the three-phonon-scattering relaxation rate. Following Verma et al., an improved dispersion relation q→=(ωv→)(1+γω2) has been used to calculate νgνp2 in the conductivity integrals. The effect of point-defect scattering on lattice thermal conductivity has been studied in the temperature range (2-100) °K. © 1973 The American Physical Society.