Elastic moduli of GaAs at moderate pressures and the evaluation of compression to 250 kbar

McSkimin, H. J. ; Jayaraman, A. ; Andreatch, P. (1967) Elastic moduli of GaAs at moderate pressures and the evaluation of compression to 250 kbar Journal of Applied Physics, 38 (5). pp. 2362-2364. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v38/i5/p2362_...

Related URL: http://dx.doi.org/10.1063/1.1709884

Abstract

Ultrasonic wave velocities in GaAs have been measured at 25°C as a function of hydrostatic pressure. The adiabatic ``zero‐electric‐field'' stiffness moduli calculated from these velocities are as follows: c11=1.1877± 0.0006, c12=0.5372±0.0009, c44=0.5944±0.0003. All moduli are in units of 1012 dyn∕cm2 and are based on a density of 5.3169 g∕cm3 taken as exact with respect to estimates of errors. Hydrostatic pressure derivatives for c11, c12, and c44, are, respectively, 4.63±0.03, 4.42±0.05, and 1.10±0.02. From the isothermal bulk modulus (BT) of 746.6 kbar and its pressure derivative (∂BT∕∂P) of 4.67 calculated using the above data, the static compression of GaAs has been computed to a pressure of 250 kbar.

Item Type:Article
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