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DOI	10.1016/j.epsl.2020.116380
	Electrical resistivity of solid and liquid Pt: Insight into electrical resistivity of ε-Fe
	Ezenwa I.C.; Yoshino T.
发表日期	2020
ISSN	0012821X
卷号	544
英文摘要	Knowledge of the transport properties of Fe and its alloys at extreme pressure (P) and temperature (T) conditions are essential for understanding the generation and sustainability of the magnetic field of the rocky planets with a metallic core. Since Pt, an unfilled d-band late transition metal with an electronic structure of Xe4f145d96s1, is paramagnetic and close-packed structure at ambient and high P–T conditions, it is expected that its transport properties at these conditions would be similar to those of ε-Fe. We investigated the T-dependent electrical resistivity of solid and liquid Pt up to 8 GPa and found it constant along its melting curve on the liquid side in agreement with theoretical investigations and experimental results estimated from thermal conductivity measurements. Our results suggest that the T-dependent resistivity of ε-Fe could be linear and would not saturate at high P,T conditions. This, in turn, suggests that the thermal conductivity of liquid Fe at Earth's core conditions may not be as high as previously suggested by models employing saturation resistivity. Hence, thermal convection could have powered the geodynamo before the birth of the inner core. The electrical resistivity and thermal conductivity on the liquid and solid sides of the inner core boundary of the Earth could be different in values. © 2020 Elsevier B.V.
关键词	electrical resistivity geodynamo magnetic field saturation resistivity thermal conductivity thermal convection
英文关键词	Electric conductivity of solids; Electronic structure; Heat convection; Iron alloys; Liquids; Transition metals; Close packed structures; Extreme pressure; Fe and its alloys; Inner core boundary; Late transition metals; Theoretical investigations; Thermal conductivity measurements; Thermal convections; Thermal conductivity of solids; alloy; electrical resistivity; geodynamo; iron; magnetic field; P-T conditions; sustainability; thermal conductivity; thermal convection
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/202577
作者单位	Institute for Planetary Materials, Okayama University, 827 Yamada Street, Misasa, Tottori 682-0193, Japan
推荐引用方式 GB/T 7714	Ezenwa I.C.,Yoshino T.. Electrical resistivity of solid and liquid Pt: Insight into electrical resistivity of ε-Fe[J],2020,544.
APA	Ezenwa I.C.,&Yoshino T..(2020).Electrical resistivity of solid and liquid Pt: Insight into electrical resistivity of ε-Fe.Earth and Planetary Science Letters,544.
MLA	Ezenwa I.C.,et al."Electrical resistivity of solid and liquid Pt: Insight into electrical resistivity of ε-Fe".Earth and Planetary Science Letters 544(2020).