Phonon-dislocation interaction in deformed lithium fluoride

Creators: Yang, In-Sang; Anderson, A. C.; Kim, Y. S.; Cotts, E. J.

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Abstract

The thermal conductivity has been measured over the temperature range 0.06–6 K for a LiF crystal before and after deformation by compression in which all possible dislocation-slip planes were activated, and after reduction in sample size and, finally, following γ-ray irradiation. At temperatures below 1 K the results are in agreement with a model of phonon scattering by fluttering dislocations. At T≥1 K the data suggest that dislocation dipoles may dominate the scattering of phonons.

Additional Information

©1989 The American Physical Society Received 28 December 1988 The authors thank H.S. Ducoff for access to the γ-ray source and G.A. Kneezel for assistance with the computations. This work was supported in part by the U.S. Department of Energy (Division of Materials Science of the Office of Basic Energy Sciences), under Contract No. DE-AC02-76ER01198 through the University of Illinois Materials Research Laboratory. I.-S.Y. was supported in part by the ministry of Education of the Republic of Korea.

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