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Open Access Relations Between Deep Traps and EPIR Effect in La0.5Ca0.5MnO3 Ceramic

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La0.5Ca0.5MnO3 (LCMO) ceramic samples were synthesized by a solid-state sintering method. The transport properties, especially the electrical pulse induced resistance switching (EPIR) effect and its accompanying memristor behavior, were investigated using 2-wire measurement mode with silver-glue electrode. The EPIR effect was observed at room temperature for the samples, which have superior anti-fatigue properties at the high and low resistance states and maintain for a long time. The value of resistance (R) is correlated to the polarity and amplitude of pulse. The EPIR occurs at pulse > 1.2 V in a width of 0.01 s. The EPIR is in a high resistance state when the pulse is positive, while the EPIR is in a lower resistance state when the pulse is reversed, and the higher and lower resistance states can be switched by changing the polarity of pulse. The R–T measurement shows that the resistance state can be maintained when the temperature decreases to below room temperature. However, the gap between the higher and lower resistance states decreases with increasing temperature, and the both states are expected to overlap at > 600 K. The deep level traps on the surface are the main cause for the EPIR effect, which occurs at the interface between the electrode and the surface of LCMO sample.
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Keywords: Schottky barrier; deep level traps; electrical pulse induced resistance switching effect; perovskite manganite; space charge layer

Document Type: Research Article

Affiliations: 1: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China 2: Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620990, Russia

Publication date: 01 December 2013

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  • Journal of the Chinese Ceramic Society (JCCS), published in Chinese and in English, is a comprehensive monthly periodical focused on the fields of inorganic and non-metallic materials. The main purpose of the JCCS is to report the latest creative achievements in research, production and design for ceramics, glass, cementing materials, refractory, artificial crystals and other non-metallic materials. JCCS is regarded as an important journal in inorganic and non-metallic materials sciences in China and has been awarded by China Association for Science and Technology. The full-text of papers in JCCS is also published by CNKI (China National Knowledge Infrastructure). JCCS is indexed in EI Compendex, CA( Chemical Abstracts) ,SA and Ж and more than 20 databases.
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