Transverse acoustic impedance measurements for surface states of superfluid 3He A 1 and A 2 phases

Satoshi Murakawa, Akira Yamaguchi, Miho Arai, Masahiro Wasai, Yuki Aoki, Hidehiko Ishimoto, Ryuji Nomura, Yuichi Okuda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We measured the complex transverse acoustic impedance in both superfluid 3He A 1 and A 2 phases. This impedance is sensitive to surface states. In our preliminary results, the temperature dependence of the impedance in the A 1 phase is similar to that in A phase, and the imaginary part shows an anomaly in the A 2 phase. These anomalies occurred at the temperature defined as T k, which is lower as the frequency gets higher. The similar frequency dependence of T k in each phase suggests that the anomaly is attributed to the same origin. The frequency dependence of the T k /T c indicates that the shape of the surface density of each spin pair state did not greatly change in the present experimental temperature range.

Original languageEnglish
Pages (from-to)141-146
Number of pages6
JournalJournal of Low Temperature Physics
Issue number1-2
Publication statusPublished - 2010 Jan
Externally publishedYes


  • Acoustic impedance
  • Superfluid He
  • Surface state

ASJC Scopus subject areas

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


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