Shear acoustic response of the superfluid helium-3

• Published in: The Journal of physics and chemistry of solids Vol. 66; no. 8; pp. 1349 - 1351
• Main Authors: Aoki, Y., Wada, Y., Saitoh, M., Nomura, R., Okuda, Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2005; Elsevier
• Subjects: A. Surfaces; C. Ultrasonic measurements; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Physics; Quantum fluids and solids; liquid and solid helium; Superfluid phase of liquid 3he; A. Surfaces; C. Ultrasonic measurements; Superfluid helium 3; Acoustic transducers; Shear; Acoustic properties; Transverse wave; Resonance frequency; Ultrasonic waves; Instrumentation; High frequency
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/j.jpcs.2005.05.009

Transverse acoustic response in the B-phase of superfluid 3He was measured by using an AC-cut quartz transducer at a pressure of 17.0 bar. The measurements were performed by a CW bridge method at a frequency of about 9.6 MHz utilizing a quadrature hybrid and a high-frequency lock-in amplifier. By sweeping frequency around the resonance frequency of the transducer, in-phase and quadrature responses of the resonance were obtained from the output of the high-frequency lock-in amplifier. The change of the Δ Q −1 and the resonance frequency Δ f 0 which were proportional to the real and the imaginary part of the transverse acoustic impedance of superfluid 3He were obtained separately.