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Non-linear mechanical response of the a-like phase of superfluid He-3 in aerogel.

Research output: Contribution to journalJournal article

Published

Journal publication date09/2007
JournalJournal of Low Temperature Physics
Journal number5-6
Volume148
Number of pages5
Pages603-607
Original languageEnglish

Abstract

We present measurements of the response of the A-like phase of superfluid He-3 in aerogel to an applied flow. The measurements are made using a cylindrical piece of 98% silica aerogel attached to a vibrating wire resonator. The resonator is immersed in superfluid He-3 at low temperatures and relatively high magnetic fields such that the aerogel confined superfluid is in the A-like phase, while the surrounding fluid is in the bulk B-phase. We observe a variety of interesting non-linear and hysteretic effects when the resonator is driven to higher velocities. We present some of our preliminary findings and speculate on their implications.