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Primary and secondary nucleation of the transition between the A and B phases of superfluid He-3.

Research output: Contribution to journalJournal article

Published

Journal publication date11/2000
JournalPhysical Review Letters
Journal number20
Volume85
Number of pages4
Pages4321-4324
Original languageEnglish

Abstract

We have studied nucleation in superfluid He-3 across the A-B phase transition driven by a magnetic field, in a controllable environment at very low temperatures. Both B --> A and A --> B secondary nucleation appear to be governed by the survival of pockets of the new phase trapped at surfaces. We find that, at fields near B-AB, primary A --> B nucleation cannot be triggered by ionizing or neutron irradiation even at very high intensities; In our cell primary A --> B nucleation can only be triggered externally by mild mechanical shock.