Abstract
Bi4Ti3O12 thin films have been grown on indium-tin-oxide coated glass by pulsed laser deposition. Films are rapidly thermal annealed at 650°C in three kinds of atmospheres such as O 2, N2, and air. The annealing atmosphere is found to be an important growth parameter which determines the crystallization, microstructures, and the leakage current behaviors. The film annealed in oxygen has a columnar grain structure with an amorphous phase, and its leakage current behavior is in agreement with the prediction of the space-charge-limited conduction model. The film annealed in nitrogen has polycrystalline porous structure, and its high field conduction is well explained by the thermoionic emission model, called the Poole-Frenkel emission. On the other hand, the film annealed in air has both the columnar and porous structures, and its electrical behavior shows characteristics of both models.
Original language | English |
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Pages (from-to) | 1525-1527 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 65 |
Issue number | 12 |
DOIs | |
State | Published - 1994 |