Negative differential resistance and pulsed current induced multi-level resistivity switching in charge ordered and disordered manganites

TL;DR

This study explores how pulsed currents induce multi-level resistivity switching in manganites, revealing effects beyond Joule heating, with implications for electronic device applications.

Contribution

It demonstrates pulse parameter-controlled resistivity switching in manganites, highlighting non-thermal mechanisms distinct from Joule heating effects.

Findings

Negative differential resistance linked to Joule heating.

Multi-level resistivity switching controlled by pulse parameters.

Switching mechanisms involve non-thermal effects.

Abstract

We have investigated direct and pulsed current induced electroresistance in two manganites with different electronic and magnetic ground states: charge-orbital ordered 50 % Ca doped NdMnO3 and 50 % Mn doped LaNiO3. It has been shown that negative differential resistance observed at high current density in these compounds is related to Joule heating. However, bi-level and multi-level resistivity switching induced by variations in pulse width and pulse period at low current density can not be attributable to Joule heating alone. We discuss possible origins.