Generation and dynamic behaviours of oxygen
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| Abstract: | Oxygen vacancy behaviorus in Ni-doped barium strontium titanate (BST) ceramics have been observed through thermally stimulated current (TSC) measurements up to 200°C. The set of observations confirmed that the vacancies drift due to a high electric field at an elevated temperature to pile up under the cathode electrode and the initial complex defects of acceptor, NiTi″, and donor, Vo&bull&bull, are separated from each other forming a forward-biased pn junction. Ir is also revealed that the oxygen vacancies are newly generated at the anode area either ir the ceramic surface is roughened or ir a catalytic electrode such as Pt is attached. |
| Author:
| Fukami, T.1 ; Agawa, D.1 ; Bamba, N.1 |
| Author Unit:
| 1 Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan |
| Year: | 2001 |
| Source: | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume-OnPage: | 405634-5637 |
| Keyword: | |
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