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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


<mark>Journal publication date</mark>11/2000
<mark>Journal</mark>Physical Review Letters
Issue number20
Number of pages4
Pages (from-to)4321-4324
<mark>Original language</mark>English


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.