4:15 PM - 4:30 PM
[SIT06-22] High-P,T elasticity of iron and iron-carbon alloy
Keywords:Inner core, Ab initio computation, Elasticity
In this study, we perform ab initio molecular dynamics simulations of iron and iron-carbon alloy. Also computations are conducted in a wide P,T range including, but not limited to, the inner core conditions to clarify the P,T effects on their elasticity more comprehensively, and to provide an internally-consistent thermoelastic model. In addition to checking the validity of the Birch’s law, the obtained Poisson ratio and aggregate anisotropy, with and without the pre-melting effect, are compared against seismological constraints to reinvestigate the viability of iron and iron-carbon alloy in the inner core.
Research supported by KAKENHI and the X-ray Free Electron Laser Priority Strategy Program (MEXT).