Ru-Xia Yang, Yu-Ming Lu, Li-Zhu Zeng, Lu-Jia Zhang, Guan-Nan Li. Effect of Gd doping on the structure, dielectric and multiferroic properties of 0.7BiFe0.95Ga0.05O3-0.3BaTiO3ceramics [J]. Acta Physica Sinica, 2020, 69(10): 107701-1
- Acta Physica Sinica
- Vol. 69, Issue 10, 107701-1 (2020)
Fig. 1. (a) XRD patterns of BGx FG - BT (x = 0, 0.05, 0.1, 0.15, 0.2) ceramics. Enlarged view of peaks at (b) 32°, (c) 39.5° and (d) 45.7°.
Fig. 2. XRD refinement of the BGx FG - BT ceramics: (a) x = 0, (b) x = 0.1. The red, blue, and green indicatethe experimental, calculated and difference value, respectively. The short bars indicate the positions of Bragg positions.
Fig. 3. The SEM images of BGx FG - BT ceramics: (a) x = 0; (b) x = 0.05; (c) x = 0.1; (d) x = 0.15; (e) x = 0.2; (f) the composition dependence of average grain size.
Fig. 4. XPS spectra of the (a) Bi 4f and (b) Fe 2p lines of BGx FG - BT (x = 0, 0.05, 0.1, 0.15 and 0.2) ceramics.
Fig. 5. Variation of ε r and tan δ with temperature at frequencies 10 kHz, 100 kHz and 1 MHz for BGx FG - BT: (a) x = 0, (b) x = 0.05, (c) x = 0.1, (d) x = 0.15, (e) x = 0.2.
Fig. 6. Leakage current density J of the BGx FG - BT (x = 0, 0.05, 0.1, 0.15, 0.2) ceramic samples as a function of the electric field E at room temperature: (a) J vs E ; (b) log J vs log E
Fig. 7. Polarization versus electric field hysteresis loops of BGx FG - BT ceramics at room temperature: (a) x = 0, (b) x = 0.05–0.2.
Fig. 8. The room temperature M -H loops of the BGx FG - BT (x = 0, 0.05, 0.1, 0.15, 0.2) ceramics.
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Table 1. The lattice parameters obtained by Rietveld refinement for BGxFG-BT (x = 0, 0.05, 0.1, 0.15, 0.2).
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