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Preparation of perovskite -based thin films from polymer-modified solution precursors
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View: Figures


Image of FIG. 1.
FIG. 1.

XRD spectra for (, 0.2, and 0.3) (a) and 0.462PZN–0.308PMN–0.23PT (b) thin films deposited on LAO substrates from different solution precursors followed by thermal annealing at 580 °C. (a) (1) 0.8PZN–0.2PT thin film from solution without PEG200 or ethylene glycol, (2) 0.8PZN–0.2PT thin film from solution with ethylene glycol, (3) 0.9PZN–0.1PT thin film from solution with PEG200, (4) 0.8PZN–0.2PT thin film from solution with PEG200, and (5) 0.7PZN–0.3PT thin film from solution with PEG200. Perovskite phase forms only when PEG200 is added into the solution precursor, as shown in (3)–(5). (b) (1) and (2) are for 0.462PZN–0.308PMN–0.23PT thin film without and with PEG200 addition in the solution precursor, respectively. Pervoskite phase forms only when PEG200 is introduced into the solution precursor. The inset figures in (a) and (b) are the scans of (110) perosvkite 0.9PZN–0.1PT and (110) perovskite 0.462PZN–0.308PMN–0.23PT, respectively.

Image of FIG. 2.
FIG. 2.

XPS profiles of Pb in single-layer 0.462PZN–0.308PMN–0.23PT thin films on LAO substrates annealed at different temperatures. The solid lines are the experimental results, and the dashed lines are the fitting curves. (a) Films derived from the solution precursor without PEG200. (b) Films derived from the PEG200-modified solution. When the films are annealed at 580 °C, pyrochlore phase forms in (a) and perovskite phase forms in (b) according to our XRD results, and the binding energies of the Pb states in the perovskite phase are higher than the pyrochlore phase.

Image of FIG. 3.
FIG. 3.

Ferroelectric and piezoelectric properties for a 0.462PZN–0.308PMN–0.23PT thin film. The film is deposited on a LSMO-coated LAO substrate from the solution precursor modified with 60 wt % PEG200 and annealed at 700 °C for 10 min. (a) A ferroelectric hysteresis loop. (b) Instantaneous vibration under a sine wave electric signal (5 V, 100 kHz). The protruding central region is covered by the Au top electrode.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Preparation of perovskite Pb(Zn1∕3Nb2∕3)O3-based thin films from polymer-modified solution precursors