研究目的
Investigating the effects of rare-earth substitution on atomic motions in piezoelectric oscillators of langasite-type crystals under alternating electric fields.
研究成果
The substitution of La by Nd in langasite-type crystals decreases RE–O bond lengths and Ga–O–Ga and Ga–O–Ga/Si bond angles, making them more difficult to deform under electric fields, which results in smaller piezoelectric constants for NGS compared to LGS. The study provides insights into the atomic-level mechanisms of piezoelectricity in these materials.
研究不足
The study is limited to langasite-type crystals (LGS and NGS) and does not cover other types of piezoelectric materials. The resolution of atomic displacements is constrained by the standard deviations of interatomic bond lengths and angles determined by X-ray crystal structure analyses.
1：Experimental Design and Method Selection:
Time-resolved X-ray diffraction (XRD) measurements under alternating electric fields were conducted to analyze the atomic motions in piezoelectric oscillators.
2：Sample Selection and Data Sources:
Commercial Y-cut LGS oscillator and fabricated Y-cut square plate crystals of PGS and NGS were used.
3：List of Experimental Equipment and Materials:
Synchrotron radiation facility (SPring-8, beamline BL02B1), function generator, voltage amplifier, current probe, large cylindrical imaging plate camera.
4：Experimental Procedures and Operational Workflow:
Resonant vibrations of the crystals were synchronized with repetitive short-pulse X-rays for time-resolved XRD measurements.
5：Data Analysis Methods:
Crystal structures were determined by least-squares refinement using the SHELX program.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
