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Temperature distribution in the laser‐heated diamond cell with external heating, and implications for the thermal conductivity of perovskite
Author(s) -
Li Xiaoyuan,
Manga Michael,
Nguyen Jeffrey H.,
Jeanloz Raymond
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl03648
Subject(s) - thermal conductivity , thermal conduction , materials science , diamond , laser , conductivity , perovskite (structure) , thermal , temperature gradient , condensed matter physics , thermodynamics , optics , composite material , chemistry , crystallography , physics , meteorology
Applying external heating reduces temperature gradients in the laser‐heated diamond cell by roughly a factor of two as the external temperature is raised by 300 K. A heat conduction model is presented which can account for most of the reduction. In addition, the temperature distribution measured in a (Mg 0.86 Fe 0.14 )SiO 3 perovskite sample at 56 GPa is compatible the expected inverse temperature‐dependence of thermal conductivity.