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Thermal Conductivity of Cr 2 O 3 in the Vicinity of the Neel Transition
Author(s) -
WILLIAMS ROBERT K.,
GRAVES RONALD S.,
MCELROY DAVID L.
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19630.x
Subject(s) - condensed matter physics , néel temperature , thermal conductivity , phonon , scattering , inflection point , atmospheric temperature range , mean free path , phonon scattering , conductivity , materials science , physics , thermodynamics , optics , mathematics , geometry , magnetization , quantum mechanics , magnetic field
Thermal conductivity (A) data for two dense Cr 2 O 3 samples are reported. The results, which span the temperature range 270 to 360 K, show an inflection near the Neel transition temperature, 308 K. An analysis shows that the slope of the higher‐temperature portion of the λlD −1 −T curve is about what would be expected for ordinary 3‐phonon U‐process scattering. Above T N the mean free path for phonon‐spin scattering is constant and equal to ∼10 nm.