Title :
Measurement of temperature sensitivity of LGT elastic coefficients over [4K, 15K] cryogenic range
Author :
Goryachev, M. ; Galliou, S. ; Bourquin, Roger ; Dulmet, B. ; Abbe, P.
Author_Institution :
Sch. of Phys. (M013), Univ. of Western Australia, Crawley, WA, Australia
Abstract :
The temperature coefficients of the effective elastic coefficients of Langatate (LGT) are determine in the range [4K, 15K]. The theoretical background is based on the Lagrangian formalism which is here mandatory since the expansion coefficients of LGT are still unknown at these temperatures. The measurement method involves a set of high-quality resonators of various cut angles, and uses the frequency-temperature records to extract the temperature coefficients of the elastic coefficients from those of the resonance frequencies.
Keywords :
Lagrangian field theory; cryogenics; elastic constants; gallium compounds; lanthanum compounds; sensitivity; temperature measurement; temperature sensors; thermal expansion; La3Ga5.5Ta0.5O14; Lagrangian formalism; cryogenics; cut angles; elastic coefficients; elastic constants; frequency-temperature records; high-quality resonators; langatate sample; resonance frequency; temperature 15 K; temperature 4 K; temperature sensitivity measurement; temperature sensors; thermal expansion coefficient; Frequency measurement; Resonant frequency; Sensitivity; Superconducting cables; Temperature distribution; Temperature measurement; Temperature sensors;
Conference_Titel :
Frequency Control Symposium (FCS), 2012 IEEE International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1821-2
DOI :
10.1109/FCS.2012.6243614
