Dilatometric Measurement of the Thermal Expansion of Cobalt Single Crystal

Abstract
The thermal expansion of an hexagonal cobalt single crystal has been measured in the temperature range between 77 and 900 K by using a comparative quartz dilatometer. The linear coefficients of the thermal expansions along the c and a axes are 17.8×10-6 and 12.5×10-6, respectively, at 300 K and increase with increasing temperature, their rates of increase being larger at low temperatures. The temperature variations of the volume expansion and the axial ratio c/a are also derived from those of the thermal expansions.

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