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DOI	10.1016/j.epsl.2021.116852
	Constraints on the thermal evolution of Earth's core from ab initio calculated transport properties of FeNi liquids
	Li W.-J.; Li Z.; He X.-T.; Wang C.; Zhang P.
发表日期	2021
ISSN	0012821X
卷号	562
英文摘要	Earth's magnetic field is generated by the liquid outer core and sensitively depends on the thermal conductivity of the core. The dominant component of the Earth's core is Fe (∼85%) and Ni (∼10%). However, current estimates on FeNi liquids have not been previously tested at high pressures. In this paper, ab initio simulations were first applied to calculations of the thermal and electrical conductivities of FeNi liquids at Earth's outer core conditions. The thermal conductivity along the adiabatic curve for FeNi fluid ranges from 120.52 to 202.80 W/m/K, but pure Fe ranges from 125.07 to 216.18 W/m/K. The age of the inner core calculated with thermal conductivity of FeNi fluid is 0.019 Ga longer than pure Fe. Nickel effect on the age of the inner core is of the same order with the uncertainty of density jump and latent heat at the inner-core boundary. Furthermore, by analyzing the effective temperature gradient, the present thickness of thermal stratification calculated with thermal conductivity of FeNi liquid is 64.5 km thinner than that of pure Fe. © 2021
关键词	ab initio molecular dynamics inner core age thermal conductivity thermal stratification
英文关键词	Binary alloys; Calculations; Iron; Iron alloys; Liquids; Molecular dynamics; Nickel; Temperature; Thermal conductivity; Ab initio; Ab initio molecular dynamics; Earth magnetic fields; Earths cores; Inner core; Inner core age; Property; Thermal; Thermal evolution; Thermal stratification; computer simulation; electrical conductivity; inner core; iron; molecular analysis; nickel; outer core; stratification; temperature gradient; thermal conductivity
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203185
作者单位	Institute of Applied Physics and Computational Mathematics, Beijing, 100088, China; Center for Applied Physics and Technology, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Li W.-J.,Li Z.,He X.-T.,et al. Constraints on the thermal evolution of Earth's core from ab initio calculated transport properties of FeNi liquids[J],2021,562.
APA	Li W.-J.,Li Z.,He X.-T.,Wang C.,&Zhang P..(2021).Constraints on the thermal evolution of Earth's core from ab initio calculated transport properties of FeNi liquids.Earth and Planetary Science Letters,562.
MLA	Li W.-J.,et al."Constraints on the thermal evolution of Earth's core from ab initio calculated transport properties of FeNi liquids".Earth and Planetary Science Letters 562(2021).