Ultrasonic study of superfluidity of 4He in a nanoporous glass

T. Kobayashi, S. Fukazawa, J. Taniguchi, M. Suzuki, Keiya Shirahama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Recently, Yamamoto et al. have carried out torsional oscillator measurements for 4He filled in a nanoporous glass containing pores 2.5 nm in diameter (Gelsil), and reported a large suppression of superfluidity at high pressures. In order to study the mechanism of the superfluid suppression, we have carried out ultrasonic measurements for 4He filled in the same nanoporous glass. We have clearly observed an increase in the sound velocity due to decoupling of the superfluid component. At zero pressure, the superfluid transition temperature TC is suppressed to 1.4 K from the bulk lambda point, 2.17 K. The pressure dependence of TC and the temperature dependence of the superfluid fraction are very different from those reported by Yamamoto et al.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages277-278
Number of pages2
Volume850
DOIs
Publication statusPublished - 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Fingerprint

superfluidity
ultrasonics
retarding
glass
acoustic velocity
decoupling
pressure dependence
transition temperature
oscillators
porosity
temperature dependence

Keywords

  • Porous glass
  • Superfluid He
  • Ultrasound

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Kobayashi, T., Fukazawa, S., Taniguchi, J., Suzuki, M., & Shirahama, K. (2006). Ultrasonic study of superfluidity of 4He in a nanoporous glass. In AIP Conference Proceedings (Vol. 850, pp. 277-278) https://doi.org/10.1063/1.2354699

Ultrasonic study of superfluidity of 4He in a nanoporous glass. / Kobayashi, T.; Fukazawa, S.; Taniguchi, J.; Suzuki, M.; Shirahama, Keiya.

AIP Conference Proceedings. Vol. 850 2006. p. 277-278.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kobayashi, T, Fukazawa, S, Taniguchi, J, Suzuki, M & Shirahama, K 2006, Ultrasonic study of superfluidity of 4He in a nanoporous glass. in AIP Conference Proceedings. vol. 850, pp. 277-278, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 06/8/10. https://doi.org/10.1063/1.2354699
Kobayashi T, Fukazawa S, Taniguchi J, Suzuki M, Shirahama K. Ultrasonic study of superfluidity of 4He in a nanoporous glass. In AIP Conference Proceedings. Vol. 850. 2006. p. 277-278 https://doi.org/10.1063/1.2354699
Kobayashi, T. ; Fukazawa, S. ; Taniguchi, J. ; Suzuki, M. ; Shirahama, Keiya. / Ultrasonic study of superfluidity of 4He in a nanoporous glass. AIP Conference Proceedings. Vol. 850 2006. pp. 277-278
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