Elastic and piezoelectric properties of La/sub 3/Ga/sub 5/SiO/sub 14/ and La/sub 3/Ga/sub 5.5/Ta/sub 0.5/O/sub 14/: an application of resonant ultrasound spectroscopy

Author

Schreuer, Jürgen

Author_Institution

Lab. of Crystallogr., Swiss Fed. Inst. of Technol., Zurich, Switzerland

Volume

49

Issue

11

fYear

2002

Firstpage

1474

Lastpage

1479

Abstract

The electromechanical properties of La/sub 3/Ga/sub 5/SiO/sub 14/ (LGS) and La/sub 3/Ga/sub 5.5/Ta/sub 0.5/O/sub 14/ (LGT) have been studied at room temperature on 25 samples using resonant ultrasound spectroscopy (RUS). The RUS method facilitates simultaneous determination of all independent elastic and piezoelectric constants of a sample within the same frequency range and yields sample parameters with high internal consistency. Consequently, the spread of the experimental results presented here is significantly lower than the scatter of literature data obtained by different experimental techniques.

Keywords

acoustic resonance; elastic constants; gallium compounds; lanthanum compounds; piezoelectric materials; ultrasonic measurement; La/sub 3/Ga/sub 5.5/Ta/sub 0.5/O/sub 14/; La/sub 3/Ga/sub 5/SiO/sub 14/; elastic compliances; elastic constants; electromechanical properties; high internal consistency; inverse problem; least squares refinements; piezoelectric constants; piezoelectric stress tensor; resonant ultrasound spectroscopy; room temperature; simultaneous determination; Acoustic scattering; Crystallization; Crystallography; Dielectric constant; Dielectric measurements; Frequency; Resonance; Shape measurement; Spectroscopy; Ultrasonic imaging; Crystallography; Elasticity; Electrochemistry; Magnetic Resonance Spectroscopy; Models, Chemical; Oxides; Sensitivity and Specificity; Silicates; Stress, Mechanical; Transducers; Ultrasonography; Vibration;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.2002.1049728

Filename

1049728