Transverse Acoustic Response Measured by AC-cut Quartz Transducer in Superfluid Helium-3 |
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Authors: | Y. Aoki Y. Wada A. Ogino M. Saitoh R. Nomura Y. Okuda |
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Affiliation: | (1) Department of Condensed Matter Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan |
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Abstract: | No Heading The transverse acoustic response in the B phase of superfluid 3He has been measured 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 9.3 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 lock-in amplifier. We successfully separated the quality factor and the resonance frequency. Quality factor of the transducer had a small dip just below Tc and increased as n by cooling, while its resonance frequency decreased sharply at Tc and gradually recovered to the normal state value in the low temperature limit.PACS numbers: 67.57.Jj, 43.58.+z. |
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