Pressure-load Calibration of Multi-anvil Press and the Thermal Gradient within the Sample Chamber

Electrical Resistivity of Fe and Fe‐3 wt%P at 5 GPa With Implications for the Moon's Core Conductivity and Dynamo

“…This strategy is reasonable considering that the measured values of phase transition ( α ‐Fe to γ ‐Fe) temperatures correspond with those from previous studies (Table 2). The Seebeck effect between W/Mo plates and TC wires is negligibly small given that the temperature gradient is small in the horizontal direction (Kim & Lee, 2018). It is possible that the Seebeck voltage between W 95 Re 5 /Mo is the same as that between W 74 Re 26 /Mo, and thus canceled out.…”

“…As shown in Figure 1b, the thermocouple is far from the sample in this case, and the measured temperature by TC is lower than that of the sample. We corrected the sample temperature according to the temperature gradient observed by Kim and Lee (2018) who applied the same heater and assembly size in their calibration work.…”

“…By contrast, the thermocouple is closer to the sample center when using the four-probe VDP technique (Figure 1b). Kim and Lee (2018) estimated that the temperature gradient in an ∼3 mm height sample chamber is ∼80 K/mm (temperature = ∼973 K) within a 14/8 assembly. This may explain the difference in Tp values derived by the quasi four-point technique (1003-1023 K) and the four-probe VDP technique (877-948 K).…”