Characterization of the pressure coefficient of manganin and temperature evolution of pressure in piston-cylinder cells.

We report measurements of the temperature- and pressure-dependent resistance, R(T, p), of a manganin manometer in a He-gas pressure setup from room temperature down to the solidification temperature of He (T ∼ 50 K at 0.8 GPa) for pressures, p, between 0 GPa and ∼0.8 GPa.