Temperature independent leakage current in Au/TbMnO3/YBa2Cu3O7-x capacitors

被引：1

作者：

Cui, Y. M. ^{[1
]}

Xu, J. X. ^{[1
]}

Pan, H. ^{[1
]}

Wang, R. M. ^{[1
]}

机构：

[1] Beihang Univ, Dept Phys, Minist Educ, Key Lab Micronano Measurement Manipulat & Phys, Beijing 100191, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2012年 / 152卷 / 02期

基金：

中国国家自然科学基金;

关键词：

TbMnO3; Capacitor; Electrical characteristic; POLARIZATION; CONDUCTION; FILMS;

D O I：

10.1016/j.ssc.2011.10.027

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Au/TbMnO3/YBa2Cu3O7-x capacitors were fabricated on LaAlO3 substrates and electrical characteristics were studied in the temperature range from 300 to 25 K. When temperature is higher than 225 K, Ohmic conduction is observed in the capacitors. Non-linear current-voltage characteristics are exhibited at low temperatures. Moreover, temperature-independent leakage currents are found at temperatures lower than 150 K. These electrical characteristics can be explained in terms of conduction transition originated from a thermal activation between 225 and 150 K, and the temperature-independent leakage currents are governed by the Poole-Frenkel emission and minor trap ionization energies. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：123 / 126

页数：4

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