Dielectric Dispersion of the Complex Perovskite Oxide Ba(Fe_<1/2>Nb_<1/2>)O_3 at Low Frequencies
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Ceramic specimens of the complex perovskite oxide Ba(Fe_<1/2>Nb_<1/2>)O_3 were fabricated by conventional solid state sintering. Dielectric constants were measured as a function of temperature as well as of frequency. As a result, dielectric constants showed an unusual temperature dependence. Moreover, a large dielectric dispersion was observed below 1 MHz, and it was represented by the Cole-Cole circular arc law. The present dielectric dispersion was interpreted on the basis of the interfacial polarization at the grain boundary region.
- 社団法人応用物理学会の論文
- 1995-09-30
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