V. V. Tomaev, V. P. Miroshkin, and L. N. Gar’kin
St. Petersburg State University of Electrical Engineering (LETI),
ul. Professora Popova 5, St. Petersburg, 197376 Russia
e-mail: tvaza@mail.ru
Received November 14, 2005
Abstract—The electrical properties of the PbSe + PbSeO3 two-phase polycrystalline composite are investi-
gated by impedance spectroscopy in the temperature range 293–393 K. The frequency dependences of the
ohmic resistance and the reactance of the samples under investigation are measured at different temperatures.
The results obtained are used to construct the loci of the impedance in the ohmic resistance (Z') and reactance
(Z'') coordinates of the total impedance Z. The activation energies for all individual components contributing to
electrical conduction in the composite are determined by impedance spectroscopy. An equivalent electric circuit
that represents the integral electric response of all individual components of the sample is proposed.
DOI: 10.1134/S1087659606050130
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