Thermal expansion coefficient of synthetic diamond single crystal at low temperatures

The lattice parameter of synthetic diamond single crystals has been measured in the range 4.2-320 K by the X-ray diffraction method. The lattice parameter is found to be nearly constant between 4.2 and 90 K. The thermal expansion coefficient α calculated from the experimental results is very small (...

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Bibliographic Details
Published in:JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE 1992-08, Vol.31 (8), p.2527-2529
Main Authors: HARUNA, K, MAETA, H, OHASHI, K, KOIKE, T
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Physics
Thermal properties of condensed matter
Thermal properties of crystalline solids
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Summary:The lattice parameter of synthetic diamond single crystals has been measured in the range 4.2-320 K by the X-ray diffraction method. The lattice parameter is found to be nearly constant between 4.2 and 90 K. The thermal expansion coefficient α calculated from the experimental results is very small (of the order of 10 -7 or less) and no definite evidence of the negative thermal expansion is found within our relative experimental accuracy of the order of ±1×10 -6 .
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.31.2527