Direct measurement of thermal conductivity in solid iron at planetary core conditions.

@article{Konpkov2016DirectMO,
  title={Direct measurement of thermal conductivity in solid iron at planetary core conditions.},
  author={Zuzana Kon{\^o}pkov{\'a} and R. Stewart McWilliams and Natalia G{\'o}mez-P{\'e}rez and Alexander F. Goncharov},
  journal={Nature},
  year={2016},
  volume={534 7605},
  pages={
          99-101
        }
}
The conduction of heat through minerals and melts at extreme pressures and temperatures is of central importance to the evolution and dynamics of planets. In the cooling Earth's core, the thermal conductivity of iron alloys defines the adiabatic heat flux and therefore the thermal and compositional energy available to support the production of Earth's magnetic field via dynamo action. Attempts to describe thermal transport in Earth's core have been problematic, with predictions of high thermal… 

Electrical and thermal conductivity of Earth’s core and its thermal evolution—A review

The Earth’s core is composed of iron, nickel, and a small amount of light elements (e.g., Si, S, O, C, N, H and P). The thermal conductivities of these components dominate the adiabatic heat flow in

Electrical Conductivity of Iron in Earth's Core from Microscopic Ohm's Law

Understanding the electronic transport properties of iron under high temperatures and pressures is essential for constraining geophysical processes. The difficulty of reliably measuring these

Heat Flow in Earth's Core From Invariant Electrical Resistivity of Fe‐Si on the Melting Boundary to 9 GPa: Do Light Elements Matter?

The electrical resistivity and thermal conductivity of liquid Fe alloys are the least constrained parameters in Earth's outer core (OC). These parameters are important as they modulate energy budget

Electrical resistivity of nickel, iron and iron-silicon alloy melts at high pressure with implications for the thermal conductivity of the Earth’s core

.............................................................................................................................. ii Co-Authorship

Blocked radiative heat transport in the hot pyrolitic lower mantle

High geomagnetic field intensity recorded by anorthosite xenoliths requires a strongly powered late Mesoproterozoic geodynamo

Significance Acquiring high-fidelity ancient magnetic field intensity records from rocks is crucial for constraining the long-term evolution of Earth’s core. However, robust estimates of ancient

Dependence of Heat Transport in Solids on Length-Scale, Pressure, and Temperature: Implications for Mechanisms and Thermodynamics

TLDR
Reliable low-pressure data on diverse thick samples reveal a new thermodynamic formula for specific heat that supports that heat conduction in solids equals diffusion of light down the thermal gradient, since changing P alters the space occupied by matter, but not by light.

The Iron Invariance: Implications for Thermal Convection in Earth's Core

Convection of the liquid iron (Fe) outer core and electrical properties of Fe are responsible for the geodynamo that generates the geomagnetic field. Recent results showed the thermal conductivity of

An Experimental Examination of Thermal Conductivity Anisotropy in hcp Iron

The Earth’s core mainly consists of iron, and its thermal transport properties are of vital importance for our understanding of the thermal evolution and the dynamics of the core and the mantle.
...

References

SHOWING 1-10 OF 53 REFERENCES

The electrical resistivity of solid and liquid Fe at pressures up to 7 GPa

The electrical resistivity of pure solid and liquid Fe has been measured at pressures up to 7 GPa in a large volume cubic anvil press. In conjunction with the four-wired method, a novel technique of

Composition and State of the Core

The composition and state of Earth's core, located deeper than 2,900 km from the surface, remain largely uncertain. Recent static experiments on iron and alloys performed up to inner core pressure

Temperature gradients in the laser‐heated diamond anvil cell

A semianalytic heat transfer model reproduces the temperature distributions measured inside the laser-heated diamond cell and constrains the temperature dependence of the thermal conductivity of

P‐V‐T equation of state for ε‐iron up to 80 GPa and 1900 K using the Kawai‐type high pressure apparatus equipped with sintered diamond anvils

In order to determine the P‐V‐T equation of state of ε‐iron, in situ X‐ray observations were carried out at pressures up to 80 GPa and temperatures up to 1900 K using the Kawai‐type high pressure

High pressure and temperature electrical resistivity of iron and implications for planetary cores

Electrical resistivity measurements of polycrystalline iron have been performed at 5, 7, and 15 GPa and in the temperature range 293–2200 K by employing a four‐wired method. The kinks in electrical

Photoproduction of [FORMULA] -mesons off the deuteron

Quasi-free photoproduction of [FORMULA] -mesons off nucleons bound in the deuteron has been measured with the combined Crystal Barrel - TAPS detector. The experiment was done at a tagged photon beam
...