Pulse width controlled resistivity switching at room temperature in Bi 0.8 Sr0.2 MnO3

Abstract

We report pulsed as well as direct current/voltage induced electroresistance in Bi0.8 Sr0.2 MnO3 at room temperature. It is shown that bilevel and multilevel resistivity switching can be induced by a sequence of pulses of varying pulse width at a fixed voltage amplitude. Resistivity increases abruptly (≈55% at 300 K) upon reducing pulse width from 100 to 25 ms for a fixed electric field (E=2 V/ cm2) of 200 ms pulse period. The resistivity switching is accompanied by a periodic change in temperature, which alone cannot explain the magnitude of the resistivity change. © 2009 American Institute of Physics.