Zero-sound attenuation in rotating and stationary 3He-A and 3He-B

J. M. Kyynäräinen*, J. P. Pekola, K. Torizuka, A. J. Manninen, A. V. Babkin

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

We report on measurements of zero-sound attenuation in rotating and stationary3He-A and3He-B, in magnetic fields up to 350 mT. Strong and highly nonlinear rotation speed dependencies of sound amplitudes have been observed in both phases. The data gives information on vortex types and core sizes, although the analysis is not straightforward. The anomalous attenuation in3He-B at 200 mT near the AB transition, both in the stationary and in the rotating state, is interpreted to arise from the distortion of the energy gap of the B phase. Excess attenuation during the AB phase change was observed. Evidence for soft vortex cores in3He-B is presented. In addition, a critical velocity in the vortex free state, related to a textural transition, and the vortex creation times have been measured in3He-B. Furthermore, a metastable structure, possibly a new vortex state, has been observed in3He-B by rotating the sample through the A → B transition.

Original languageEnglish
Pages (from-to)325-367
Number of pages43
JournalJournal of Low Temperature Physics
Volume82
Issue number5-6
DOIs
Publication statusPublished - Mar 1991
MoE publication typeA1 Journal article-refereed

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