Resistivity anomalies in ferroelectrics with percolation type diffuse phase transitions

I. P. Rayevsky Institute of Physics, Rostov State University, 194 Stachki St., 344104, Rostov-on-Don, Russia

A. N. Pavlov Institute of Physics, Rostov State University, 194 Stachki St., 344104, Rostov-on-Don, Russia

M. A. Malitskaya Institute of Physics, Rostov State University, 194 Stachki St., 344104, Rostov-on-Don, Russia

Yu. M. Popov Institute of Physics, Rostov State University, 194 Stachki St., 344104, Rostov-on-Don, Russia

V. G. Poltavtsev Institute of Physics, Rostov State University, 194 Stachki St., 344104, Rostov-on-Don, Russia

Abstract

In semiconductive ceramics of Na_0.5Bi_0.5TiO₃ and K_0.5Bi_0.5TiO₃ resistivity anomalies are observed which do not coincide with the anomalies of other electrophysical and optical properties and show anomalously large temperature hysteresis. These anomalies are accompanied by additional dielectric anomalies. It is assumed that these unusual properties are due to percolation effects caused by the coexistence of several phases within a wide temperature range.

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Resistivity anomalies in ferroelectrics with percolation type diffuse phase transitions

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Resistivity anomalies in ferroelectrics with percolation type diffuse phase transitions

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