MAGNETO-ACOUSTIC ABSORPTION IN SOLIDS.
JOHN CARROLL UNIV CLEVELAND OHIO DEPT OF PHYSICS
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The elastic constants of 3 alkali metals were measured as a function of temperature. The ultrasonic pulse-echo technique was used to measure potassium in the temperature range 4.2-195K and sodium in the range 78-300K. Results were in good agreement with other published data. Single crystals of rubidium were grown by a modified Bridgeman technique in an argon atmosphere elastic constants were not obtained, however, due to an inability to orient crystals by x-ray techniques. Magneto-acoustic measurements were made on crystals of potassium at 10, 30, and 50 mcsec to obtain dimensions of Fermi surface change in attenuation with magnetic field was also measured. Ultrasonic attenuation measurements were also conducted on magnesium single crystals at 10-290 mcsec. A list of the publications and these emanating from this grant are presented. Author