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Updated: Jul 23, 2025

Ultrasound Velocity Measurement in a Liquid Metal Electrode
Published on: August 5, 2015
Measuring the Electrical Resistivity of Liquid Iron to 1.4 Mbar
Kenji Ohta1, Sho Suehiro1, Saori I Kawaguchi2
1Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo 152-8551, Japan.
Abstract:
We determined the electrical resistivity of liquid Fe to 135 GPa and 6680 K using a four-probe method in a diamond-anvil cell combined with two novel techniques: (i) enclosing a molten Fe in a sapphire capsule, and (ii) millisecond time-resolved simultaneous measurements of the resistance, x-ray diffraction, and temperature of instantaneously melted Fe. Our results show the minimal temperature dependence of the resistivity of liquid Fe and its anomalous resistivity decrease around 50 GPa, likely associated with a gradual magnetic transition, both in agreement with previous ab initio calculations.
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