Torsional oscillator experiment on superfluid 4He confined in a porous alumina nanopore array

S. Murakawa, R. Higashino, K. Yoshimura, Y. Chikazawa, T. Tanaka, K. Kuriyama, K. Honda, Y. Shibayama, K. Shirahama

研究成果: Conference article査読

1 被引用数 (Scopus)

抄録

We studied superfluidity of liquid 4He confined in an array of well-characterized straight nanopores of porous alumina (PA). The PA plate sample of 45 nm pore size is set in an annular flow channel and the superflow is detected by torsional oscillator (TO) technique. Superfluid transition T c in the nanopores is suppressed by 3.5 mK from the bulk λ point. Tc is consistent with the temperature at which the healing length is equal to the pore radius. We have observed many anti-crossing anomalies in the TO frequency associated with dissipation peaks, which are attributed to the coupling to second sound resonances.

本文言語English
論文番号012053
ジャーナルJournal of Physics: Conference Series
400
PART 1
DOI
出版ステータスPublished - 2012
イベント26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
継続期間: 2011 8月 102011 8月 17

ASJC Scopus subject areas

  • 物理学および天文学一般

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