Superfluid transition of a 4He thin film pressurized by bulk liquid 3He

Masahiro Wasai, Satoshi Murakawa, Yuta Tamura, Yuichiro Wada, Yuki Aoki, Ryuji Nomura, Yuichi Okuda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We measured transverse acoustic impedance Z of normal fluid 3He at 46.6 MHz on a surface coated with a thin 4He film. The real component of the impedance, Z′, in the coated samples deviates from Z′ in the pure 3He in the low temperature region. Z′ on the coated samples is almost identical with Z′ in the pure sample at high temperature and gradually deviates below a particular temperature T onset. T onset is possibly the superfluid onset temperature of the 4He film pressurized by the bulk liquid 3He. The gradual decrease in Z′ means that the superfluid component in 4He film increases gradually, which is expected from the dynamic KT transition at high frequency. The thicker is the film, the higher is the T onset. The range of T onset we observed was between 40 and 160 mK. This is much lower than that at the saturated vapor pressure. Suppression of T onset achieved by the applied pressure from bulk liquid 3He was presumably caused by the dissolved 3He in the film, thickening of the inert layers and/or by the strong correlation effect. The result shows that the specularity of 3He quasiparticle scattering is strongly affected by superfluidity of the 4He film.

Original languageEnglish
Pages (from-to)268-274
Number of pages7
JournalJournal of Low Temperature Physics
Volume158
Issue number1-2
DOIs
Publication statusPublished - 2010 Jan

Fingerprint

Thin films
Liquids
liquids
thin films
Superfluid helium
Temperature
Acoustic impedance
acoustic impedance
superfluidity
Vapor pressure
vapor pressure
retarding
impedance
Scattering
Fluids
temperature
fluids
scattering

Keywords

  • He film
  • Acoustic impedance
  • Normal fluid He
  • Superfluid

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)

Cite this

Wasai, M., Murakawa, S., Tamura, Y., Wada, Y., Aoki, Y., Nomura, R., & Okuda, Y. (2010). Superfluid transition of a 4He thin film pressurized by bulk liquid 3He. Journal of Low Temperature Physics, 158(1-2), 268-274. https://doi.org/10.1007/s10909-009-0017-6

Superfluid transition of a 4He thin film pressurized by bulk liquid 3He. / Wasai, Masahiro; Murakawa, Satoshi; Tamura, Yuta; Wada, Yuichiro; Aoki, Yuki; Nomura, Ryuji; Okuda, Yuichi.

In: Journal of Low Temperature Physics, Vol. 158, No. 1-2, 01.2010, p. 268-274.

Research output: Contribution to journalArticle

Wasai, M, Murakawa, S, Tamura, Y, Wada, Y, Aoki, Y, Nomura, R & Okuda, Y 2010, 'Superfluid transition of a 4He thin film pressurized by bulk liquid 3He', Journal of Low Temperature Physics, vol. 158, no. 1-2, pp. 268-274. https://doi.org/10.1007/s10909-009-0017-6
Wasai, Masahiro ; Murakawa, Satoshi ; Tamura, Yuta ; Wada, Yuichiro ; Aoki, Yuki ; Nomura, Ryuji ; Okuda, Yuichi. / Superfluid transition of a 4He thin film pressurized by bulk liquid 3He. In: Journal of Low Temperature Physics. 2010 ; Vol. 158, No. 1-2. pp. 268-274.
@article{e380bbc306f24b1d9539e762190de815,
title = "Superfluid transition of a 4He thin film pressurized by bulk liquid 3He",
abstract = "We measured transverse acoustic impedance Z of normal fluid 3He at 46.6 MHz on a surface coated with a thin 4He film. The real component of the impedance, Z′, in the coated samples deviates from Z′ in the pure 3He in the low temperature region. Z′ on the coated samples is almost identical with Z′ in the pure sample at high temperature and gradually deviates below a particular temperature T onset. T onset is possibly the superfluid onset temperature of the 4He film pressurized by the bulk liquid 3He. The gradual decrease in Z′ means that the superfluid component in 4He film increases gradually, which is expected from the dynamic KT transition at high frequency. The thicker is the film, the higher is the T onset. The range of T onset we observed was between 40 and 160 mK. This is much lower than that at the saturated vapor pressure. Suppression of T onset achieved by the applied pressure from bulk liquid 3He was presumably caused by the dissolved 3He in the film, thickening of the inert layers and/or by the strong correlation effect. The result shows that the specularity of 3He quasiparticle scattering is strongly affected by superfluidity of the 4He film.",
keywords = "He film, Acoustic impedance, Normal fluid He, Superfluid",
author = "Masahiro Wasai and Satoshi Murakawa and Yuta Tamura and Yuichiro Wada and Yuki Aoki and Ryuji Nomura and Yuichi Okuda",
year = "2010",
month = "1",
doi = "10.1007/s10909-009-0017-6",
language = "English",
volume = "158",
pages = "268--274",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer New York",
number = "1-2",

}

TY - JOUR

T1 - Superfluid transition of a 4He thin film pressurized by bulk liquid 3He

AU - Wasai, Masahiro

AU - Murakawa, Satoshi

AU - Tamura, Yuta

AU - Wada, Yuichiro

AU - Aoki, Yuki

AU - Nomura, Ryuji

AU - Okuda, Yuichi

PY - 2010/1

Y1 - 2010/1

N2 - We measured transverse acoustic impedance Z of normal fluid 3He at 46.6 MHz on a surface coated with a thin 4He film. The real component of the impedance, Z′, in the coated samples deviates from Z′ in the pure 3He in the low temperature region. Z′ on the coated samples is almost identical with Z′ in the pure sample at high temperature and gradually deviates below a particular temperature T onset. T onset is possibly the superfluid onset temperature of the 4He film pressurized by the bulk liquid 3He. The gradual decrease in Z′ means that the superfluid component in 4He film increases gradually, which is expected from the dynamic KT transition at high frequency. The thicker is the film, the higher is the T onset. The range of T onset we observed was between 40 and 160 mK. This is much lower than that at the saturated vapor pressure. Suppression of T onset achieved by the applied pressure from bulk liquid 3He was presumably caused by the dissolved 3He in the film, thickening of the inert layers and/or by the strong correlation effect. The result shows that the specularity of 3He quasiparticle scattering is strongly affected by superfluidity of the 4He film.

AB - We measured transverse acoustic impedance Z of normal fluid 3He at 46.6 MHz on a surface coated with a thin 4He film. The real component of the impedance, Z′, in the coated samples deviates from Z′ in the pure 3He in the low temperature region. Z′ on the coated samples is almost identical with Z′ in the pure sample at high temperature and gradually deviates below a particular temperature T onset. T onset is possibly the superfluid onset temperature of the 4He film pressurized by the bulk liquid 3He. The gradual decrease in Z′ means that the superfluid component in 4He film increases gradually, which is expected from the dynamic KT transition at high frequency. The thicker is the film, the higher is the T onset. The range of T onset we observed was between 40 and 160 mK. This is much lower than that at the saturated vapor pressure. Suppression of T onset achieved by the applied pressure from bulk liquid 3He was presumably caused by the dissolved 3He in the film, thickening of the inert layers and/or by the strong correlation effect. The result shows that the specularity of 3He quasiparticle scattering is strongly affected by superfluidity of the 4He film.

KW - He film

KW - Acoustic impedance

KW - Normal fluid He

KW - Superfluid

UR - http://www.scopus.com/inward/record.url?scp=73349119941&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=73349119941&partnerID=8YFLogxK

U2 - 10.1007/s10909-009-0017-6

DO - 10.1007/s10909-009-0017-6

M3 - Article

AN - SCOPUS:73349119941

VL - 158

SP - 268

EP - 274

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 1-2

ER -