Abstract
Polycrystalline samples of the spinel ferrite system Zn0.3Mn0.7+xTixAl0.1Fe1.9−2xO4 (x = 0.0–0.3) have been studied for electrical switching in the temperature range from 300 to 700 K and applied voltage range from 0 to 400 V. High electric field induced resistance switching of nearly 200% has been observed for all the compositions. The dependence of temperature and applied electric field strength on switching has been examined. The electric field and temperature required for switching increase with increase in Mn–Ti concentration. The results have been interpreted considering previous models and have been ascribed to the existence of space charge limiting current in the system. The switching observed, is of current-controlled negative resistance (CCNR)-type.
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