| Ag/Nd0.7Sr0.3MnO3陶瓷界面电输运性质研究 |
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| 引用本文： | 陈顺生,黄昌,王瑞龙,杨昌平,Medvedeva I V,孙志刚.Ag/Nd0.7Sr0.3MnO3陶瓷界面电输运性质研究[J].物理学报,2011,60(3):37304-037304. |
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| 作者姓名： | 陈顺生 黄昌 王瑞龙 杨昌平 Medvedeva I V 孙志刚 |
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| 作者单位： | (1)湖北大学物理学与电子技术学院,铁电压电材料与器件湖北省重点实验室,武汉 430062; (2)武汉理工大学,材料复合新技术国家重点实验室,武汉 430070 |
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| 基金项目： | 国家自然科学基金(批准号: 10774040, 10911120055/A0402)和教育部新世纪人才基金 (批准号: NCET-08-0674)资助的课题. |
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| 摘 要： | 用渗银和银胶接触两种方法分别在多晶Nd0.7Sr0.3MnO3陶瓷样品上制作电极,用两线和四线模式对两种接触界面的直、交流特性进行测量.结果发现:渗银电极与陶瓷样品之间具有很好的欧姆接触特性,两线、四线模式下的电阻测量值相近,并且没有电脉冲诱导电阻转变(EPIR)效应;而用银胶接触作电极时,V-I曲线表现出关于原点对称的非线性特征,并出现稳定的室温EPIR效应.两种不同方法制备的电极在交流电场下的输运也有很大差异:渗银电极阻抗
关键词：
界面
接触电阻
EPIR效应
钙钛矿结构锰氧化物
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| 关 键 词： | 界面 接触电阻 EPIR效应 钙钛矿结构锰氧化物 |
| 收稿时间： | 2010-03-17 |
The electrical transport properties of Ag/Nd0.7 Sr0.3 MnO3 ceramic interface |
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| Chen Shun-Sheng,Huang Chang,Wang Rui-Long,Yang Chang-Ping,Medvedeva I V,Sun Zhi-Gang.The electrical transport properties of Ag/Nd0.7 Sr0.3 MnO3 ceramic interface[J].Acta Physica Sinica,2011,60(3):37304-037304. |
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| Authors: | Chen Shun-Sheng Huang Chang Wang Rui-Long Yang Chang-Ping Medvedeva I V Sun Zhi-Gang |
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| Institution: | The Provincial Key Laboratory of Piezoelectric Ceramics Materials and Apparatus, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China;The Provincial Key Laboratory of Piezoelectric Ceramics Materials and Apparatus, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China;The Provincial Key Laboratory of Piezoelectric Ceramics Materials and Apparatus, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China;The Provincial Key Laboratory of Piezoelectric Ceramics Materials and Apparatus, Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | The transport properties of interface between metal electrode and Nd0.7Sr0.3MnO3 bulk have been investigated under 2-wire measuring mode using permeating Ag and Ag-glue contact, respectively. The results show that, for the permeating Ag contact, the measured results are similar to that of 4-wire measurement, and an ohmic character is obtained without EPIR effect. However, a strongly nonlinear V-I curve appears and exhibits a stable EPIR effect for the Ag-glue contact. Besides, It also shows remarkable difference when loaded with alternating current for the two different kinds of contacts. For the former, the real part of impedance R' increases with increasing frequency which is attributable to the skin effect; for the latter, however, the R' is of about megohm order of magnitude and the R' peak decreases with increasing frequency. Moreover, the R' peak splits into two peaks which respectively move to high and low temperature when further increasing the frequency. In combination with the data of scanning electron microscopy, the differences of electrical transport are discussed. |
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| Keywords: | interface contact resistance EPIR effect perovskite structure manganite |
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