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

fYear

2012

fDate

21-24 May 2012

Firstpage

1

Lastpage

5

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; La₃Ga_5.5Ta_0.5O₁₄; 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium (FCS), 2012 IEEE International

Conference_Location

Baltimore, MD

ISSN

1075-6787

Print_ISBN

978-1-4577-1821-2

Type

conf

DOI

10.1109/FCS.2012.6243614

Filename

6243614