Electrical properties of manganin at high pressures and dynamic loading temperatures

The volume-temperature dependence of the specific electrical resistance of manganin in the pressure range of 5 $\div$ 70 GPa and temperatures of 300 $\div$ 1,000 K of step shock compression is investigated. The electrical resistance of manganin samples is measured under dynamic loading by plane one-dimensional shock waves. Thermal and caloric equations of state of manganin are developed, using which the volume-temperature dependence of the specific electrical resistance of shock-compressed manganin is reconstructed. Under the assumption of reversibility of the specific electrical resistance of the metal, a semi-empirical model of the change in the specific electrical resistance of manganin under compression and unloading, including the hysteresis effect of the manganin sensor, is formulated.