QCM study of superfluid transition in 4He films adsorbed in SBA-15

K. Matsuda, M. Hieda, T. Matsushita, T. Suzuki, Kazuyuki Kuroda, N. Wada

    Research output: Contribution to journalArticle

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    Abstract

    A quartz crystal microbalance (QCM) is a useful tool to study the superfluidity of 4He films at very high frequencies. Our recent efforts to fabricate mesoporous silica films onto QCM have enabled us to study the noble superfluidity adsorbed in nanopores. In this paper we report results of QCM measurements for the superfluid 4He films in SBA-15 with one-dimensional nanopores 4.1 nm in diameter and ∼ 1 μM in length. From the 4He pressure isotherm at 4.2 K, a uniform layer is formed in the nanopores up to the coverage of 48 μmol/m2, corresponding to ∼ 2.5 layers. The superfluid response is measured at 12 MHz for various coverages in the temperature range of 0.1 - 1.5 K. Above the onset coverage of ∼ 23 μmol/m2, we observed a frequency shift accompanied by a dissipation peak due to the superfluid Kosterlitz-Thouless (KT) transition.

    Original languageEnglish
    Article number032053
    JournalJournal of Physics: Conference Series
    Volume150
    Issue number3
    DOIs
    Publication statusPublished - 2009

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    quartz crystals
    microbalances
    superfluidity
    very high frequencies
    frequency shift
    isotherms
    dissipation
    silicon dioxide
    temperature

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    QCM study of superfluid transition in 4He films adsorbed in SBA-15. / Matsuda, K.; Hieda, M.; Matsushita, T.; Suzuki, T.; Kuroda, Kazuyuki; Wada, N.

    In: Journal of Physics: Conference Series, Vol. 150, No. 3, 032053, 2009.

    Research output: Contribution to journalArticle

    Matsuda, K. ; Hieda, M. ; Matsushita, T. ; Suzuki, T. ; Kuroda, Kazuyuki ; Wada, N. / QCM study of superfluid transition in 4He films adsorbed in SBA-15. In: Journal of Physics: Conference Series. 2009 ; Vol. 150, No. 3.
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