Experimental evidence for hydrogen incorporation into Earth's core

S Tagawa, N Sakamoto, K Hirose, S Yokoo… - Nature …, 2021 - nature.com
Hydrogen is one of the possible alloying elements in the Earth's core, but its siderophile
(iron-loving) nature is debated. Here we experimentally examined the partitioning of …

Experimental determination of the electrical resistivity of iron at Earth's core conditions

K Ohta, Y Kuwayama, K Hirose, K Shimizu, Y Ohishi - Nature, 2016 - nature.com
Earth continuously generates a dipole magnetic field in its convecting liquid outer core by a
self-sustained dynamo action. Metallic iron is a dominant component of the outer core, so its …

Experimental and simulation efforts in the astrobiological exploration of exooceans

RS Taubner, K Olsson-Francis, SD Vance… - Space Science …, 2020 - Springer
The icy satellites of Jupiter and Saturn are perhaps the most promising places in the Solar
System regarding habitability. However, the potential habitable environments are hidden …

Melting curve of iron to 290 GPa determined in a resistance-heated diamond-anvil cell

R Sinmyo, K Hirose, Y Ohishi - Earth and Planetary Science Letters, 2019 - Elsevier
The Earth's core is composed mainly of iron. Since the liquid core coexists with solid at the
inner core boundary (ICB), the melting point of iron at 330 GPa offers a key constraint on …

Equation of state of liquid iron under extreme conditions

Y Kuwayama, G Morard, Y Nakajima, K Hirose… - Physical Review Letters, 2020 - APS
The density of liquid iron has been determined up to 116 GPa and 4350 K via static
compression experiments following an innovative analysis of diffuse scattering from liquid …

Thermodynamics and equations of state of iron to 350 GPa and 6000 K

PI Dorogokupets, AM Dymshits, KD Litasov… - Scientific reports, 2017 - nature.com
The equations of state for solid (with bcc, fcc, and hcp structures) and liquid phases of Fe
were defined via simultaneous optimization of the heat capacity, bulk moduli, thermal …

Measuring the electrical resistivity of liquid iron to 1.4 Mbar

K Ohta, S Suehiro, SI Kawaguchi, Y Okuda… - Physical Review Letters, 2023 - APS
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 …

Wide-ranged multiphase equation of state for iron and model variations addressing uncertainties in high-pressure melting

CJ Wu, LX Benedict, PC Myint, S Hamel, CJ Prisbrey… - Physical Review B, 2023 - APS
We describe the construction of a wide-ranged multiphase equation of state for elemental
iron, consisting of four solid phases and one fluid phase. The free-energy models for the …

Thermodynamics of melting relations in the system Fe‐FeO at high pressure: Implications for oxygen in the Earth's core

T Komabayashi - Journal of Geophysical Research: Solid Earth, 2014 - Wiley Online Library
The thermodynamics of melting relations in the system Fe‐FeO was investigated to the outer
core–inner core boundary condition from a self‐consistent thermodynamic database which …

Interstitial hydrogen atoms in face-centered cubic iron in the Earth's core

D Ikuta, E Ohtani, A Sano-Furukawa, Y Shibazaki… - Scientific Reports, 2019 - nature.com
Hydrogen is likely one of the light elements in the Earth's core. Despite its importance, no
direct observation has been made of hydrogen in an iron lattice at high pressure. We made …