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

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

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号032053
ジャーナルJournal of Physics: Conference Series
150
3
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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