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arXiv 0902.1281cond-mat.mtrl-sci
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Bi0.8Sr 0.2MnO 3室温脉宽控制电阻率反转

Pulse width controlled resistivity switching at room temperature in Bi0.8Sr0.2MnO3

A. Rebello, R. Mahendiran

摘要:

我们报告脉冲以及直流电流/电压在Bi 0.8Sr 0.2MnO 3在室温下诱导的电电阻。结果表明,在固定的电压幅值下,一系列不同脉冲宽度的脉冲可以引起双电平和多电平电阻率开关。对于200 ms脉冲周期的固定电场(E = 2 V/cm 2),当脉冲宽度从100 ms减小到25 ms时,电阻率突然增加(在300 K时= 55%)。电阻率转换伴随着温度的周期性变化,温度的周期性变化不能单独解释电阻率变化的幅度。

英文摘要:

We report pulsed as well as direct current/voltage induced electroresistance in Bi0.8Sr0.2MnO3 at room temperature. It is shown that bi-level and multi-level resistivity switching can be induced by a sequence of pulses of varying pulse width at fixed voltage amplitude. Resistivity increases abruptly (= 55 % at 300 K) upon reducing pulse width from 100 ms 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 can not explain the magnitude of the resistivity change.

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