Exploring oxygen pressure effects on phase transitions, ferroelectric properties, and ultrasonic transducer performance in (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 thin films by pulsed laser deposition
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Bibliographic record
Abstract
This study investigates the effect of oxygen pressure (P O 2 ) during pulsed laser deposition on the structural, ferroelectric, and piezoelectric properties of thin films. Films were deposited at P O 2 levels of 8.6, 10, 11.5, and 12.7 Pa. The optimal ferroelectric properties were observed at 10 Pa, with a remnant polarization of 2.97 μ C/cm 2 , a coercive field of 33.80 kV/cm, and a saturation polarization of 11.88 μ C/cm 2 , closely matching the target composition. X-ray diffraction and Raman spectroscopy confirmed the presence of a morphotropic phase boundary (MPB) near room temperature. The MPB shifts toward lower temperatures with increasing P O 2 , as characterized by the photoacoustic technique. Frequency measurements based on photoacoustic and piezoelectric effects demonstrated promising performance for piezoelectric micromachined ultrasonic transducers, with resonance frequencies ranging from 9.5 to 13 MHz.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it