Kunpeng Cai

Unipolar memristive Switching in Bulk Negative Temperature Coefficient Thermosensitive Ceramics

A memristive phenomenon was observed in macroscopic bulk negative temperature coefficient nickel monoxide (NiO) ceramic material. Current-voltage characteristics of memristors, pinched hysteretic loops were systematically observed in the Ag/NiO/Ag cell. A thermistor-based model for materials with negative temperature coefficient was proposed to explain the mechanism of the experimental phenomena. Most importantly, the results demonstrate the potential for a realization of memristive systems based on macroscopic bulk materials.

Hysteretic current-voltage characteristic in polycrystalline ceramic ferrites

Electric transport properties of sintered polycrystalline Zn0.6Mn0.4Fe2O4 ferrite prepared by traditional solid reaction method were studied. A hysteretic current-voltage characteristic was found, and it could be tuned by both relatively low electric field and magnetic field at room temperature. A magnetic hysteresis related electron transmission model was proposed to explain the results. The tunable electric transport properties are potentially significant for electronic applications, such as nonvolatile random access memories, memristors, and other circuit elements with memory.