Abstract
We have measured the shear modulus of bcc solid 3 He at 827 Hz using the high- Q torsional oscillator technique. We observed a decrease in the shear modulus from the low-temperature value G0 to about 0.4G0 at a molar volume of 24.80 cm 3/mole and to 0.6G0 at 24.32 cm 3/mole near the melting point. The reduction of an effective shear modulus is explained by the dislocation theory of Granato and Lucke.
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