Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures
Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures
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Pt-Pr0 67Ca0 33MnO3-Pt 夹层结构中脉冲长度和幅度相关的电阻开关机制
DOI:
10.1088/1367-2630/17/3/033011
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发表时间:
2015
影响因子:
3.3
通讯作者:
M. Kamlah
中科院分区:
文献类型:
--
作者:
M. Scherff;B.-U. Meyer;J. Hoffmann;Ch. Jooss;M. Feuchter;M. Kamlah
We report here on the presence of two different nonvolatile resistive switching mechanisms in Pt-Pr 0.67 Ca 0.33 MnO 3-Pt sandwich structures based on pulsed electrical transport measurements. As a function of pulse length, amplitude and temperature, the devices show two different switching regimes. The first is positive switching (PS) where a high resistance state (HRS) evolves at positive bias at the top electrode in the voltage range of U≈ 0.5–1.2 V and pulse lengths t p≈ 10− 7 s. In addition, we observe a cross over to negative switching (NS) for U> 1 V and t p≈ 10− 3 s. Here, the HRS evolves at negative bias applied at the top electrode. We present strong evidence that both switching mechanisms take place at the interface between Pr 0.67 Ca 0.33 MnO 3 and the top electrode. Based on finite element simulations of the temperature evolution during the electrical pulses, we show that the onset of Joule heating is characteristic of the PS regime, whereas drastic temperature increases of several hundred Kelvin evolve during NS. Based on the observed different timescales, pulse amplitudes and temperature dependences of PS and NS, respectively, we suggest that two different switching mechanisms are involved: a fast, short range exchange of oxygen at the interface with the metallic electrode for PS and a slower, long range redistribution of oxygen in the entire PCMO film for the NS.
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影响因子:
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作者:
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通讯作者:
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作者:
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期刊:
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DOI:
--
发表时间:
2001
期刊:
影响因子:
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