Thermal conductivity of dense hcp iron:Direct measurements using laser heated diamond anvil cell

作     者：Pinku Saha Aritra Mazumder Goutam Dev Mukherjee Pinku Saha;Aritra Mazumder;Goutam Dev Mukherjee

作者机构：National Centre for High Pressure StudiesDepartment of Physical SciencesIndian Institute of Science Education and Research KolkataMohanpur CampusMohanpur741246NadiaWest BengalIndia 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2020年第11卷第5期

页      面：1755-1761页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：Ministry of Earth Sciences,Government of India for financial support under the project grant no.MoES/16/25/10-RDEAS DST,INSPIRE program by Department of Science and Technology,Government of India for financial support 

主　　题：Laser heated diamond anvil cell Thermal conductivity High pressure effects Geodynamo 

摘      要：Thermal conductivity(k)of iron is measured up to about 134 *** measurements are carried out using the single sided laser heated diamond anvil cell,where the power absorbed by a Fe metal foil at hotspot is calculated using a novel thermodynamical *** conductivity of fee(γ)-Fe increases up to a pressure of about46 *** find thermal conductivity values in the range of 70-80 Wm-1K-1(with an uncertainty of 40%),almost constant with pressure,in the hcp(e)phase of *** attribute the pressure independent k above 46 GPa to the strong electronic correlation effects driven by the electronic topological transition(ETT).We predict a value of thermal conductivity ofε-Fe of about 40±16 Wm-1K-1 at the outer core of Earth.