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The article is devoted to the investigation of electric properties of ferroelectric-semiconducting AgPbAsSe 3 at pressures up to 45 GPa and the existence of phase transitions in this compound. Our data show that there are two phase transitions at 1.5-2 and 31-32 GPa.

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Samples of tricadmium diarsenide with MnAs nanogranules (44.7 mol % MnAs) are synthesized. The morphology of the samples is studied by X-ray phase analysis and electron microscopy. The electrical properties of tricadmium diarsenide with MnAs nanogranules are studied in a range of temperatures of 77-372 K. It is found that the voltammetric characteristics are symmetrical relative to the inversion of the voltage sign at this temperature, and their deviation from ohmicity at a certain threshold voltage and decrease in the region of ohmicity with the growth in temperature are determined by the increase in the breakdown probability in a field above 5 × 10 4 V/m.

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