Abstract
We have studied the giant negative electroresistance (ER) in strips and pillars of single-layer La 0.9Sr 0.1MnO 3 films fabricated by micro-fabrication patterning processes, and observed the different voltage–current ( V– I) characteristics under current-in-plane (CIP) and current-perpendicular-to-plane (CPP) measurement modes, around room temperature. For the CIP mode, V– I curves show an asymmetry with jumps at the negative bias currents, while a symmetrical hysteresis against the polarity for the CPP one. The mechanism is illuminated in the letter. Furthermore, a large ER is obtained for both modes and the ER ratios increase monotonically with the temperature and bias current, suggestive of a promising potential in future device developments.
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