Magnetic Properties of Germanium-Doped Cadmium Telluride

摘要

The considerable contribution of van Vlek paramagnetism, which is caused by the presence of charged interstitial Te atoms and donor–acceptor pairs of the V_(Te)Ge_i type, to the total magnetic susceptibility of CdTe:Ge in the temperature range 4.2–300 K is revealed. The presence of a special feature in the (T) dependence at 50 K is caused by a variation in the charge state of interstitial Tei atoms, whose contribution starts to compete with a diamagnetic contribution induced by motion of vacancies along closed hexahedral ring-shaped trajectories. In fields as high as 0.15 T, magnetic hysteresis, which is caused by the orientation of magnetic clusters in the external field, is observed.