| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Alternating-Current Transport Properties of the Interface between Nd0.7Sr0.3MnO3 Ceramic and a Ag Electrode |
| CHEN Shun-Sheng1,2, YANG Chang-Ping1,5**, LUO Xiao-Jing1, Bärner K.3, Medvedeva I. V.4 |
1Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062
2Faculty of Mathematics and Physics, Huangshi Institute of Technology, Huangshi 435003
3Department of Physics, University of Göttingen, Tammanstrasse 1-37077 Göttingen, Germany
4Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Ekaterinburg 620219, Russia
5State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004
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| Cite this article: |
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YANG Chang-Ping, Medvedeva I. V., LUO Xiao-Jing et al 2012 Chin. Phys. Lett. 29 027302 |
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Abstract Electrical transport properties of the interface between a Nd0.7Sr0.3MnO3 ceramic and a Ag electrode are investigated using the ac impedance over a wide temperature and frequency ranges. The ac impedance measurements give the compressed semicircle arcs at different temperatures, which are used for the analysis of different contributions to electrical transport based on an electrical equivalent circuit. A significant interface-dependent electroresistance effect of 530% is clearly developed around the metal-insulator transition temperature 130 K, which is confirmed as the interface-layer dependent Curie temperature by the plot of interfacial conductance with frequency at different temperatures.
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| Keywords:
73.40.Cg
73.20.-r
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Received: 06 October 2011
Published: 11 March 2012
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| PACS: |
73.40.Cg
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(Contact resistance, contact potential)
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73.20.-r
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(Electron states at surfaces and interfaces)
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