Ultrasonic study of superfluidity of 4He in a nanoporous glass

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

研究成果: Conference contribution

3 引用 (Scopus)

抄録

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.

元の言語English
ホスト出版物のタイトルAIP Conference Proceedings
ページ277-278
ページ数2
850
DOI
出版物ステータスPublished - 2006
イベントLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
継続期間: 2006 8 102006 10 17

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
United States
Orlando, FL
期間06/8/1006/10/17

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

Kobayashi, T., Fukazawa, S., Taniguchi, J., Suzuki, M., & Shirahama, K. (2006). Ultrasonic study of superfluidity of 4He in a nanoporous glass. : AIP Conference Proceedings (巻 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. 巻 850 2006. p. 277-278.

研究成果: Conference contribution

Kobayashi, T, Fukazawa, S, Taniguchi, J, Suzuki, M & Shirahama, K 2006, Ultrasonic study of superfluidity of 4He in a nanoporous glass. : AIP Conference Proceedings. 巻. 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. : AIP Conference Proceedings. 巻 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. 巻 850 2006. pp. 277-278
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