Hypersonic Attenuation in Antimony-Doped Germanium and Its Magnetic Field Dependence

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 1×10¹⁶ Sb atoms/cm³ is quantitatively explained by the simple relaxation formula; (2) the attenuation is anomalously large in a sample with 1×10¹⁵/cm³ 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.