Dielectric Properties of SbSI at Microwave Frequencies

Abstract
The complex dielectric constants κ=κ'-iκ'' along the c axis of SbSI at 3.3 and 9.8 GHz have been measured between 0°C and 50°C. The value of κ' in paraelectric phase is found to show as high value as 3×104 even in this frequency range. No remarkable dielectric dispersion was observed below 9.8 GHz. No essential difference was found between 3.3 and 9.8 GHz. The values of tan δ at 3.3 and 9.8 GHz are about 0.1 and 0.3, respectively, near the Curie temperature. To ascertain the accuracy of the cavity perturbation method, a new expression is proposed.

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