| Autor: |
Yang, Hao, Chen, Bin, Miao, Jun, Zhao, Li, Xu, Bo, Dong, Xiaoli, Cao, Lixin, Qiu, Xianggang, Zhao, Bairu |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 11/22/2004, Vol. 85 Issue 21, p5019-5021, 3p, 5 Graphs |
| Abstrakt: |
Pt/(Ba0.7Sr0.3)TiO3(BST)/YBa2Cu3O7-x(YBCO) capacitors were fabricated on (001) LaAlO3 substrates. The leakage current density-electric field characteristics were measured in the temperature range from 20 to 300 K. In the electric field region of >0.7 MV/cm for positively biased Pt electrode and >1.4 MV/cm for negatively biased Pt electrode, the leakage current shows space-charge-limited-current behavior from 20 to 250 K. Meanwhile a positive temperature coefficient of resistivity (PTCR) in the temperature range from 20 to 150 K was observed and attributed to the strong negative temperature dependence of the dielectric constant of BST thin films. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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