Abstract
The temperature and magnetic-field dependence of hypersonic attenuation in Sb-doped Ge is measured at liquid He temperatures. It is found that (1) the temperature dependence of attenuation in a sample with 1×10 16 Sb atoms/cm 3 is quantitatively explained by the simple relaxation formula; (2) the attenuation is anomalously large in a sample with 1×10 15 /cm 3 Sb atoms; (3) the attenuation shows maxima as a function of magnetic field and this behavior cannot be explained by existing theories even when the Zeeman effect and internal stresses are taken into account.
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