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High mechanical quality factor of calcium fluoride (CaF2) at room temperature

Published online by Cambridge University Press:  04 March 2005

Z. Yan ,
L. Ju ,
S. Gras ,
C. Zhao  and
D. G. Blair
Z. Yan*
Affiliation:
School of Physics, University of Western Australia, Nedlands, WA 6009, Australia Research Institute of Synthetic Crystals, Beijing 100018, P.R. China
L. Ju
Affiliation:
School of Physics, University of Western Australia, Nedlands, WA 6009, Australia
S. Gras
Affiliation:
School of Physics, University of Western Australia, Nedlands, WA 6009, Australia
C. Zhao
Affiliation:
School of Computer and Information Science, Edith Cowan University, Mt. Layley, WA 6050, Australia
D. G. Blair
Affiliation:
School of Physics, University of Western Australia, Nedlands, WA 6009, Australia
*
yanzewu@hotmail.com
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Abstract

We present results on the room temperature mechanical quality factor of single crystal calcium fluoride (CaF2) grown by the Bridgman-Stockbarger method. Resonant mode Q-factors are measured in the frequency range 20 to 76 kHz using tungsten wire loop suspensions. In spite of indications of only moderate crystal purity, we observed 6 modes with Q-factor > 107, and one with $Q = 4.5 \times 10 ^{7}$, more than an order of magnitude higher than previously reported results.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 30 , Issue 3 , June 2005 , pp. 189 - 192
Copyright
© EDP Sciences, 2005

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