Влияние температуры и давления на электросопротивление некоторых халькогенидов 2-й группы

Abstract

The influence of temperature up to 560 K and pressure up to 5,5 GPa on electroresistance of polycrystalline cadmium telluride and cadmium selenide was researched. The influence of temperature on beginning of phase transition and on size of the electroresistance jumping in the field of phase transition was determined. The rating of breadth of the forbidden zone for a phase of low pressure was conducted. With pressure increasing the diminution of an own breadth of a forbidden zone appears. It was found out, that the most critical parameter for using of investigated substances as high-temperature pressure calibrants is the jumping of electroresistance. It is recommended to utilize the investigated substances as pressure calibrants at temperatures up to 700 K.