Measurement of Microwave Dielectric Constants of Ferroelectrics Part II. Dielectric Constants and Dielectric Losses of NaNO₂ and (Glycine)₃·H₂SO₄

Abstract

Dielectric constants and loss tangents of NaNO₂ and (Glycine)₃·H₂SO₄(TGS) single crystals have been measured at 3.3 kMc/s by the resonant cavity method from room temperature to 200°C for NaNO₂ and to 80°C for TGS. Dielectric constants measured along the b-axes of the both crystals at 3.3 kMc/s are smaller than those at 1 Mc/s. No dielectric dispersion has been observed along the a- and c-axes of NaNO₂. Dielectric constants along these axes increase monotonically with temperature. The mechanisms of the dielectric dispersion of the both crystals are discussed in connection with their spectroscopic properties and crystal structures.