科研之友
微信
新浪微博
Facebook
分享链接
摘要
Au/TbMnO3/YBa2Cu3O7-x capacitors were fabricated on SrTiO3 substrates by pulse laser deposition technique, of which electric properties were investigated in the temperature range from 25 to 300 K. Both current-voltage characteristics and junction resistances with bias voltages showed remarkable temperature dependence, in which obvious thermally excited relaxation processes were found between 150 and 200 K. At the temperatures lower than the activation process, the leakage currents of the capacitors were studied. Interestingly, at high electric field, the mechanism of the leakage was Poole-Frenkel emission. However, at low electric field, the conduction was not Ohmic, and ideal lnJ proportional to E-1/4 characteristics were observed. Analysis showed that the possible origin was related to the inherent inhomogeneous nature of activationless percolating transport.
- 出版日期2013-2
- 单位北京航空航天大学; 中国建筑材料科学研究总院
