High-temperature electromechanical loss in piezoelectric langasite and catangasite crystals

Published

August 23, 2021

Author(s)

Yuriy Suhak, Holger Fritze, Andrei Sotnikov, Hagen Schmidt, Ward L. Johnson

Abstract

Temperature-dependent acoustic loss Q^-1 is studied in partially disordered langasite (LGS, La3Ga5SiO14) and ordered catangasite (CTGS, Ca3TaGa3Si2O14) crystals and compared to previously reported CTGS and langatate (LGT, La3Ga5.5Ta0.5O14) data. Two independent techniques, a contactless tone-burst excitation technique and contacting resonant piezoelectric spectroscopy are used in the study. It is shown that losses in LGS and CTGS are caused by a superposition of several mechanisms, including intrinsic phonon-phonon loss, point-defect relaxations and conductivity-related relaxations. Contributions to the measured Q^-1(T) are determined through fitting to physics-based functions and the extracted fit parameters, including activation energies of the processes, are discussed. Options for loss minimization are presented

Citation

Journal of Applied Physics

Volume

130

Pub Type

Journals

Download Paper

https://doi.org/10.1063/5.0058751

Local Download

Keywords

acoustic loss, catangasite, CTGS, conductivity, high temperatures, langasite, LGS, langatate, LGT, piezoelectric sensors

Citation

Suhak, Y. , Fritze, H. , Sotnikov, A. , Schmidt, H. and Johnson, W. (2021), High-temperature electromechanical loss in piezoelectric langasite and catangasite crystals, Journal of Applied Physics, [online], https://doi.org/10.1063/5.0058751, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932236 (Accessed October 9, 2025)