Electrical Properties of Dy2O3-Doped BaTiO3

概要

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The effects of Dy addition on the electrical properties of BaTiO3 have been studied by analyzing equilibrium electrical conductivity as a function of temperature, oxygen partial pressure (Po2) and composition. In(Ba1-xDyx)TiO3+0.5x, the conductivity follows the $-1/4$th power dependence of Po2 at high oxygen activities, which supports the notion that cation vacancies are generated to compensate for Dy donors, and is nearly independent of Po2 where electron compensation prevails at a low Po2. The incorporation of "Dy3+" ion into Ti sites up to 2.0 mol% showed the typical acceptor-doped behavior of the Dy3+ ion. Curie temperature ($T_{\text{c}}$) was systematically decreased when the Dy3+ ion was incorporated into Ti sites.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2004-12-15