| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Nonvolatile Resistive Switching and Physical Mechanism in LaCrO$_{3}$ Thin Films |
| Wan-Jing Hu1,2, Ling Hu1**, Ren-Huai Wei1, Xian-Wu Tang1, Wen-Hai Song1, Jian-Ming Dai1, Xue-Bin Zhu1**, Yu-Ping Sun1,3,4 |
1Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
2University of Science and Technology of China, Hefei 230026
3High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031
4Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093
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| Cite this article: |
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Wan-Jing Hu, Ling Hu, Ren-Huai Wei et al 2018 Chin. Phys. Lett. 35 047301 |
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Abstract Polycrystalline LaCrO$_{3}$ (LCO) thin films are deposited on Pt/Ti/SiO$_{2}$/Si substrates by pulsed laser deposition and used as the switching material to construct resistive random access memory devices. The unipolar resistive switching (RS) behavior in the Au/LCO/Pt devices exhibits a high resistance ratio of $\sim 10^{4}$ between the high resistance state (HRS) and low resistance state (LRS) and exhibits excellent endurance/retention characteristics. The conduction mechanism of the HRS in the high voltage range is dominated by the Schottky emission, while the Ohmic conduction dictates the LRS and the low voltage range of HRS. The RS behavior in the Au/LCO/Pt devices can be understood by the formation and rupture of conducting filaments consisting of oxygen vacancies, which is validated by the temperature dependence of resistance and x-ray photoelectron spectroscopy results. Further analysis shows that the reset current $I_{\rm R}$ and reset power $P_{\rm R}$ in the reset processes exhibit a scaling law with the resistance in LRS ($R_{0}$), which indicates that the Joule heating effect plays an essential role in the RS behavior of the Au/LCO/Pt devices.
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Received: 11 January 2018
Published: 13 March 2018
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| PACS: |
73.40.Rw
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(Metal-insulator-metal structures)
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73.50.-h
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(Electronic transport phenomena in thin films)
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73.61.-r
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(Electrical properties of specific thin films)
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73.61.Ng
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(Insulators)
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| Fund: Supported by the Joint Funds of the National Natural Science Foundation of China and the Chinese Academy of Sciences' Large-Scale Scientific Facility under Grant No U1532149, and the National Basic Research Program of China under Grant No 2014CB931704. |
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