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Figure 4
(a) Leakage current curve of the BSO1, BSO2 and BSO3 thin films. (b) Ferroelectric hysteresis loops of the BSO1, BSO2 and BSO3 thin films. (c) Ferroelectric hysteresis loops of the BSO1, BSO2 and BSO3 thin films in the electric field range from −600 to 600 kV cm−1. (d) Crystal structure of the BSO unit cell. |