Temperature Dependence of the Dielectric Constant of Diamond

The temperature dependence of the dielectric constant of diamond has been measured over the temperature range 50-200°C. The value of -1 d / dT over this range is + 1 × 10 -5 . Details of the method of measuring the temperature coefficient of dielectric constant are also given. The magnitude and sign of -1 d / dT for diamond has been theoretically calculated using Maxwell's relationship and Kramers-Heisenberg theory. The agreement between theoretical and experimental values is extremely good.