科研之友
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摘要
A new symmetric two- terminal non- volatile electrical pulse induced resistance- change ( EPIR) device is fabricated in the Pr0.7Ca0.3MnO3 ( PCMO) materials system and analysed. Two actual devices of somewhat different construction are tested. Both consist of two similar half- parts, characterized by similar resistance versus pulse voltage hysteresis loops, which are reversely connected together in series forming a reflection symmetric device. Even though the devices are as physically symmetric as possible, they are found to exhibit resistance- switching under the application of voltage pulses of different amplitude and of different polarities. Asymmetric model of the above device is proposed, and its analysis confirms the features noted above. The switching is history dependent and shows multi- intrinsic state resistance switching, which is very useful for developing future multi- bit EPIR devices.
- 出版日期2006-10-9
