Far-infrared reflection of Sr([Ga, Fe]_1/2, Ta_1/2)O₃

Abstract

Sr([Ga, Fe]_1/2, Ta_1/2)O₃ were prepared by conventional solid state reaction using high purity reagent. Dielectric properties and far-infrared reflectivity of these samples were measured at room temperature. In microwave range, permittivity and Qf value of the samples increased and decreased with Fe substitution respectively. Permittivity spectra obtained from far infrared reflectivity also showed same tendency with microwave measurement. It was found that the ncrease of permittivity were concerned with decrease of lattice vibration frequency of 1^st mode. Dielectreic loss obtained from the fitting spectra also increased with Fe substitution.