Abstract
In this work, the electrical resistivity and thermodynamic properties of iron under high pressure have been investigated by using the semi-empirical approach. The recently well-established Gruneisen parameter expressions have been applied to derive the Debye frequency and temperature under compression. Using these results combined with the Bloch–Gruneisen law, the resistivity of iron has also been determined up to Earth’s core pressures. We show that the electrical resistivity diminished gradually with pressure and saturates at high pressure. Our model gives low electrical resistivity values which are in agreement with the recent experimental measurements. The low resistivity may be attributed to the well-known resistivity saturation effect at high temperature, which was not considered in earlier models of core conductivity.
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