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Quartz crystal resonators exhibiting extremely high Q-factors at cryogenic temperatures

Quartz crystal resonators exhibiting extremely high Q-factors at cryogenic temperatures

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© The Institution of Engineering and Technology
Published

5 MHz bulk acoustic wave resonators had already been immersed in cryostats in order to reach quality factors greater than tens of millions at 4 K. The cryostat has been substituted by a cryogenerator, which is easier to use. The first overtones of the three vibration modes of 10 MHz SC-cut electrodeless resonators have then been investigated, leading to extremely high Q-factors of about 130×106 at 31 MHz, measured at 3.3 K on an unexpected mode.

Inspec keywords: Q-factor; cryogenic electronics; crystal resonators

Other keywords: cryogenerator; temperature 4 K; temperature 3.3 K; SiO2; Q-factors; electrode less resonators; bulk acoustic wave resonators; vibration modes; quartz crystal resonators

Subjects: Piezoelectric devices

References

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      • Galliou, S., Imbaud, J., Bourquin, R., Bazin, N., Abbé, Ph.: `Outstanding quality factors of bulk acoustic wave resonators at cryogenic temperature', Proc. 22nd EFTF, May 2008, Toulouse, France.
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      • D.B. Fraser . (1968) Impurities and anelasticity in crystalline quartz, Physical acoustics.
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      • A. El Habti . (1993) Study of resonators and oscillators at very low temperatures.
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      • A.W. Warner . Ultra-precise quartz crystal frequency standards. IRE Trans. Instrum. , 185 - 188
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      • Robichon, G., Groslambert, J., Gagnepain, J.J.: `Frequency stability of quartz crystal at very low temperatures: preliminary results', Proc. 38th IEEE AFCS, 1984, p. 201–205.
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