Magnetically induced persistent and self-oscillatory conductivity in Cd1-xZnxTe

The influence of Zn content on the magnetic and electrical properties of Cd1-xZnxTe crystals is investigated. Increasing Zn concentration leads to the emergence of weak ferromagnetism associated with defect-related magnetic clusters. Crystals exhibiting this magnetic response demonstrate a persistent increase in electrical conductivity by up to three orders of magnitude after exposure to pulsed magnetic field. In addition, long-term self-oscillatory conductivity dynamics with characteristic times of ~20 h are observed. The effects are correlated with the presence of Fe-containing defect complexes and are attributed to magnetically stimulated reconfiguration of metastable defect states acting as deep traps. The results reveal a coupling between the magnetic impurity subsystem and charge transport, enabling controlled modification of electrical properties in Cd1-xZnxTe.