Temperature- and field-dependent leakage current of Pt/(Ba[sub 0.7]Sr[sub 0.3])TiO[sub 3] interface

Hao Yang, N.; Bin Chen; Kun Tao; Xianggang Qiu, N.; Bo Xu; Bairu Zhao, N.
August 2003
Applied Physics Letters;8/25/2003, Vol. 83 Issue 8, p1611
Academic Journal
Pt/(Ba[sub 0.7]Sr[sub 0.3])TiO[sub 3](BST)/YBa[sub 2]Cu[sub 3]O[sub 7-x](YBCO) capacitors on SrTiO[sub 3] substrates were fabricated. The temperature and field dependence of the leakage current of Pt/BST interface were studied in the temperature range from 100 K to 320 K and in an electric field up to 3 MV/cm. For a middle electric field (<1 MV/cm), the leakage current shows space-charge-limited-current behavior in the temperature range from 100 K to 200 K. In the case of a high electric field (>1.8 MV/cm), the leakage mechanism is governed by the Fowler–Nordheim tunneling in the whole measured temperature range. © 2003 American Institute of Physics.


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